Geological Observation of Kabaena Island

Geological Observation of Kabaena Island GEOLOGICAL OBSERVATION OF KABAENA ISLAND, SOUTEAST SULAWESI: AN IMPLICATION OF HYDROCARBON OCCURRENCE IN FRONTIER AREA BASED ON OUTCROP ANALOGUE STUDY Iyan Fadhlurrohman* Aprila Fitriani Parma* Citra Fitriani** Adi Maulana* ABSTRACT Kabaena island, located in the southeast Sulawesi province, has a complex tectonic condition due to its history. Field research on the island indicates that Kabaena Island formed by the rendezvous between microcontinent plates with oceanic plates that made up the complex lane between ophiolite and metamorphic rocks. These rocks were found from the results of field geological mapping. The aim of this paper is to explain the geological condition and potential occurrences of hydrocarbon based on outcrop model and petrographic analysis. The results of petrographic observations indicate ultramafic rocks containing minerals Ca-Rich and Mg-Rich pyroxene and Olivine. While the metamorphic rocks show the occurrences of Chlorite, Amphibolite and sericite minerals. Observation of thin section in limestone lithology shows that these rocks had fracture porosity that might become reservoir rocks. The limestone unit had undergone metamorphism process and mostly changed into marble. The black shale rocks which from limestone units locally occurred on this island, mostly changed into metamorphic rocks and associated with low-level process that characterized several changes into slate. The black shale rocks may contain the organic matters as source rock potential. Tectonic conditions in the study area indicates the occurrence of thrust fault by ultramafic rocks from oceanic into microcontinent plate. The other analysis also indicates another strike slip fault correlating the presence of gas seepage points in limestone unit. Some outcrops found as result of a one week geological mapping on Kabaena island. Several samples were used in petrographic observations. Key Words: Kabaena Island, Reservoir Rock, Source Rock, Hydrocarbon. INTRODUCTION Hydrocarbon exploration research in eastern region of Indonesia was done by few, especially in Kabaena island. This area was formed by the rendezvous between microcontinent plates with oceanic plates that made up the complex lane between ophiolite and metamorphic rocks. Tectonic conditions in the study area indicates the occurrence of thrust fault by ultramafic rocks on the plates microcontinent. Previous research revealed the potential source rock in the form of black shale of Kabaena Island area. Vitrinite reflectance results included in catagenesis phase (oil window) and indicate the mature rock but potentially less of total organic carbon (TOC). These rocks are locally distributed in research area, characterized by poorly lateral continuity of black shale (Ibrahim et al., 2014). Therefore, geological observation is needed to determine the development of the geological conditions of the research area. This is a continuation of previous studies which showed some samples of the oil content has a pyrite content in them (Ibrahim et al., 2014). Although the total organic carbon in the sample is less potential, but it is needed to provide additional data for developing research of hydrocarbon potential in the research area and its implications for petroleum system. METHODS The geological mapping on Kabaena island were conducted to identify the characterization of each formation (Simandjuntak et al, 1993) from outcrop locations. This research conducted from early until late March 2016. A few sample were collected and had been analyzed in the laboratory with petrography methods to determine mineral and rock properties type as characteristics and hydrocarbon potential occurrence. RESULTS Geology of Research Area Geomorphology Geomorphology observation in research area is generally comprised of plains and mountains. The morphological units of research area are divided based on classification of landform (Brahmantyo and Bandono, 2006) using topography analysis, DEM map analysis and field observation. Based on that, the units divided into mountains faults, karst hills, plains of rivers, and coastal plains.   The mountains faults and karst mountains are generally composed by pompangeo complex, ultramafic complex, and formation Matano. Whereas the landscape river plains and coastal plains composed by Langkowala formations and alluvial deposits. Characteristic of river flow system is a sub-dendritic pattern with vertical and lateral erosion. Land use is generally for residential land, plantation and mining areas. Stratigraphy The general lithology that was exposed on the research area comprised of sedimentary rock, igneous, and metamorphic rocks. The Rocks outcrop are commonly in scouring the walls due to roads expansion and bottom of rivers. The research area consists with various Pre-Tertiary rocks, Tertiary, and Quaternary. Pre-Tertiary Cretaceous rocks became the oldest rocks on Kabaena island, composed of ultramafic Complex, Matano Formation, and Pompangeo Complex from Cretaceous period to Paleocene epoch. The tertiary rocks composed of Miocene Formation of Langkowala and then Alluvium complete the formation from quaternary (Simanjuntak, et al., 1993). This research focused on Pre-Tertiary rocks that has implication of hydrocarbon occurrence. Ultramafic rocks in the area observed as shattered zone which influenced by the tectonic structure of thrust fault. The Lithological unit founded as Peridotite, Dunite and locally serpentinite. In the field observation, the peridotite showed grayish black physical characteristics and reddish condition of weathering (Figure 3).   That litholohy has holocrystalline texture, phaneritic granularity, subhedral-euhedral crystal shape, equigranular texture relation, and massive structures. Pompangeo complex are generally composed of low-moderate grade metamorphic rocks. Lithology which composed these metamorphic rocks are phyllite, mica schist, amphibole schist and chlorite schist. The field observation from the metamorphic rocks shown that foliated structure with direction relatively changing. It also showed the structure of the minor folds found in the study area (Figure 3). On Matano formations, limestone is spread on the east to the south of research area. These rocks characterized with carbonate minerals such as calcite and dolomite as the form of diagenetic process. Limestone lithology unit on the research area mostly changed into meta-limestone and marble which can be seen on petrographic observations in the form of a change of the mineral calcite. The Matano formation also formed a black shale lithological unit that generally changed into slate (Figure 4). Geological Structure The geological structure in research area was formed by thrust fault and strike-slip fault which refers to the geological map sheet of Kolaka, South East Sulawesi (Simandjuntak, et al., 1993). Each fault composed of irregular direction. The major stress direction commonly from Northeast to Southwest and Northwest to Southeast. Strike slip fault might control the deposition of rocks while the thrust fault limiting each lithology. The faults only found in pre-tertiary rocks. Tertiary rocks are not affected by the presence of faults. Petrography Analysis The results of petrography analysis were observed on thin section from rock samples of peridotite, amphibolite schist, slate, limestone, and shale. Peridotite rocks characterized with holocrystalline and phaneritic texture which composed by Ca-Rich Pyroxene, Mg-Rich pyroxene, and olivine Mineral Group (Figure 5). Based on the mineral content (Streckeisen, 1976) peridotite rocks classified as harzburgite, olivine websterite, and wherlite (Figure 6). Petrographic observations for muscovite schist shows foliated structure which composed of muscovite, Actinolite, Hornblende, and quartz (Figure 7). While at slate textures encountered sub-ophitic form with mineral content of clay minerals, quartz and calcite. On Matano formations limestone shows the occurrence of calcite and dolomite minerals which spread on each sample (Figure 8). A few samples encountered showed a type of fracture porosity as part of secondary pores.   Shale rock composed by clay minerals, quartz, and calcite mineral due to dissolution from carbonate rocks. Petroleum Implication The presence of source rock and reservoir rock from Matano formation made the research more focused into this formation based on potential hydrocarbon occurrence. Matano formation in the study area is scattered in the middle to the eastern part of research area. Reservoir rock that could potentially save the hydrocarbon reserves in the form of crystalline limestones, while the host rock in the form of black shale. Source rock is an important element in determining the quality of produced hydrocarbons. Source rocks in the study site were found in Matano formation that had partially transformed into slate rocks due to pressure and temperature. It is associated with the process of low level metamorphism in the study area. Based on the results of geological mapping, the black shale rocks scattered in several locations and has the type of local deployment. It can be seen on the field observation stations map. The results of geochemical analysis show host rock into the category of mature but has unfavorable TOC value (Ibrahim et al. 2014). Potential reservoir rocks in the study area was found in the Matano formations lithology, with its characteristic crystalline limestones. Limestone is spread laterally with layer thickness of 200-500m. Based on field observations gas seepage was found on one of observation station. Petrographic observations on thin section analysis shows rock porosity with 0-5%. P orosity that can be found was the fracture porosity. However, interconnectivity of pores is poor, because of the existence of calcite and dolomite cement and the recrystallization of calcite matrix. It might reduce pores which results in lower porosity and permeability quality. CONCLUSIONS The geological condition on research area comprised of geomorphological analysis which composed of mountains faults, karst hills, plains of rivers, and coastal plains morphological units, stratigraphical analysis which formed by ultramafic complex, matano formation, pompangeo complex, langkowala formation, and alluvium deposit. While the research area characterized by thrust fault, and strike slip fault with major direction stress northeast to southwest and northwest to southeast. Based on the petrographical analysis, the reservoir target which is a limestone of matano formation with limestone lithology characterized with fracture porosity which has poor quality of pores (0%-5%) while source rock target from black shale has bad TOC value. ACKNOWLEDGEMENTS The authors want to express their thanks to all the family in geological department University of Hasanuddin which have given attention and support to do geological field mapping. Special thanks to Mr. Kaharuddin MS whom always give moral support to finish the research activity. REFERENCES      Ã‚   Simandjuntak, T.O., Surono, and Sukido, 1993, Geological Map sheet of Kolaka, Sulawesi, 1:250.000, Geological Research and Development Centre, Bandung. Ibrahim, M. A., Rustandi, U., Suryana, A., 2014, Penyelidikan Bitumen Padat Daerah Pulau Kabaena Kabupaten Bombana, Provinsi Sulawesi Tenggara. Proceedings Geological Resource Center. Surono, 1994, Stratigraphy of The Southeast Sulawesi Continental Terrane, Eastern Indonesia. Journal of Geology and Mineral Resources, V. IV, Pp. 4-11, April 1994 Brahmantyo, B., and Bandono, 2006, Classification of Earth Landform for Geomorphological Mapping at Scale 1: 25,000 and Its Application to Spatial Analysis.Geoaplika Journal Vol. 1 No. 2, 2006, Hal. 71-78 Figure 1 Geological Map of Kabaena Island (Modified after Simandjuntak, 1993) Figure 2 Stratigraphy of Southeast Sulawesi (Modified after Surono, 1993) Figure 3 Outcrop Location for peridotite and schist lithology. The schist sample location exist on a few station location which spread from North to Northeast from the map whereas peridotite spread on northeast to southwest. Figure 4 An outcrop observation map of limestone and shale lithology. Limestone from ST14 location characterized as crystalline with a massive structure whereas ST23 characterized as limestone interbedded with shale. ST9 and ST15 location characterized as calcareous shale as an occurrence of calcite minerals. Figure 5 Thin section of peridotite showed exist of Ortho-pyroxene mineral interpreted as hypersthene (4F). Some of olivine (6F) and Clino-pyroxene (1I) exist on this sample Figure 6 Mineral plotting for occurrence of major mineral (Opx-Cpx-Ol) from ultramafic igneus rock classification (Streckeisen, 1976) Figure 7 Sample A interpreted as schist muscovite which dominated by muscovite, hornblende, and sericite. Sericite mineral as changing from muscovite mineral (1B). Sample B shown occurrence of clay mineral (5I) and calcite (2H). This sample interpreted as calcareous shale Figure 8 Thin section of limestone sample shown the occurrence of fracture porosity (A. 6A-6F) Sample A and B dominated by dolomite while Sample C and D shown that the calcite minerals had changed as metamorphic process

Nothing of Importance Happened Today Essay -- History Great Britain En

Nothing of Importance Happened Today On July 4, 1776, King George III of Great Britain wrote in his diary: â€Å"Nothing of Importance Happened Today†. Due to the length of time it took for news to reach London from America, King George could not have foreseen how ironic those words would become. The same could be said of those involved in the events surrounding the crash of an airborne object in Roswell, New Mexico on a hot July night in 1947. HOW IT BEGAN: A Crash in Roswell, New Mexico ON-THE-SCENE EYEWITNESSES DESCRIBE CRASH AND UNUSUAL WRECKAGE On the night of July 4, 1947, William Woody, who lived east of Roswell, was outside with his father at their ranch, when they saw a brilliant fiery object plunge to the ground (IUFOMRC). On the morning of July 8th, Roswell Sheriff George Wilcox, who along with W. W. â€Å"Mac† Brazell, found the crashed object on the J. B. Foster sheep ranch near Corona, 85 miles northwest of Roswell. Brazell, who lived on a nearby ranch, had notified the sheriff the day before about the crash (AJ). Wilcox called Major Jesse Marcel, Intelligence Officer at the nearby Roswell Army Air Force Base[1], informing him of his find. Marcel, joined by Sheriff Wilcox and Sheridan Cavitt, Counter-Intelligence Officer from the Roswell base, raced to investigate the crash site (Jaroff). Brazell, waited near the crash site while Wilcox, Marcel, and Cavitt investigated the crash site, and later reported that Wilcox described the crash site to him, including details of wreckage with undecipherable characters and markings on some of the debris, which had been scattered over a large area (IUFOMRC). Glenn Dennis was working as a mortician at Ballard Funeral Home in Roswell. Dennis reported receiving phone ... ...ork. 18 Feb. 1994. Fleck, John. â€Å"Bringing ‘Roswell Incident’ Back to Earth†. Albuquerque Journal. Tuesday, July 31, 2001. Handy, Bruce. â€Å"Roswell or bust: a town discovers manna crashing from heaven and becomes the capital of America's alien nation.† Time, June 23, 1997: p62. IUFOMRC: International UFO Museum and Research Center. â€Å"The Roswell Incident†. Jaroff, Leon. â€Å"Did Aliens Really Land?† Time Magazine, July 23, 1997. Megadeth. Hangar 18. Los Angeles, California: Capitol Records, 1992. Roswell Chamber of Commerce. â€Å"Roswell UFO Festival - 2002 - Calendar of Events† USAF: United States Air Force Web Information Service. â€Å"Roswell Report: Case Closed† June 24, 1997. [1] Prior to 1948, the United States Air Force was a branch of the United States Army, and at the time of the Roswell crash, was still known as the United States Army Air Force. Nothing of Importance Happened Today Essay -- History Great Britain En Nothing of Importance Happened Today On July 4, 1776, King George III of Great Britain wrote in his diary: â€Å"Nothing of Importance Happened Today†. Due to the length of time it took for news to reach London from America, King George could not have foreseen how ironic those words would become. The same could be said of those involved in the events surrounding the crash of an airborne object in Roswell, New Mexico on a hot July night in 1947. HOW IT BEGAN: A Crash in Roswell, New Mexico ON-THE-SCENE EYEWITNESSES DESCRIBE CRASH AND UNUSUAL WRECKAGE On the night of July 4, 1947, William Woody, who lived east of Roswell, was outside with his father at their ranch, when they saw a brilliant fiery object plunge to the ground (IUFOMRC). On the morning of July 8th, Roswell Sheriff George Wilcox, who along with W. W. â€Å"Mac† Brazell, found the crashed object on the J. B. Foster sheep ranch near Corona, 85 miles northwest of Roswell. Brazell, who lived on a nearby ranch, had notified the sheriff the day before about the crash (AJ). Wilcox called Major Jesse Marcel, Intelligence Officer at the nearby Roswell Army Air Force Base[1], informing him of his find. Marcel, joined by Sheriff Wilcox and Sheridan Cavitt, Counter-Intelligence Officer from the Roswell base, raced to investigate the crash site (Jaroff). Brazell, waited near the crash site while Wilcox, Marcel, and Cavitt investigated the crash site, and later reported that Wilcox described the crash site to him, including details of wreckage with undecipherable characters and markings on some of the debris, which had been scattered over a large area (IUFOMRC). Glenn Dennis was working as a mortician at Ballard Funeral Home in Roswell. Dennis reported receiving phone ... ...ork. 18 Feb. 1994. Fleck, John. â€Å"Bringing ‘Roswell Incident’ Back to Earth†. Albuquerque Journal. Tuesday, July 31, 2001. Handy, Bruce. â€Å"Roswell or bust: a town discovers manna crashing from heaven and becomes the capital of America's alien nation.† Time, June 23, 1997: p62. IUFOMRC: International UFO Museum and Research Center. â€Å"The Roswell Incident†. Jaroff, Leon. â€Å"Did Aliens Really Land?† Time Magazine, July 23, 1997. Megadeth. Hangar 18. Los Angeles, California: Capitol Records, 1992. Roswell Chamber of Commerce. â€Å"Roswell UFO Festival - 2002 - Calendar of Events† USAF: United States Air Force Web Information Service. â€Å"Roswell Report: Case Closed† June 24, 1997. [1] Prior to 1948, the United States Air Force was a branch of the United States Army, and at the time of the Roswell crash, was still known as the United States Army Air Force.

Agriculture of Pakistan Essay

Agriculture is a vital sector of Pakistan’s economy and accounted for 25. 9 percent of GDP in 1999-2000, according to government estimates. The sector directly supports three-quarters of the country’s population, employs half the labor force , and contributes a large share of foreign exchange earnings. The main agricultural products are cotton, wheat, rice, sugarcane, fruits, and vegetables, in addition to milk, beef, mutton, and eggs. Pakistan depends on one of the world’s largest irrigation systems to support production. There are 2 principal seasons. Cotton, rice, and sugarcane are produced during the kharif season, which lasts from May to November. Wheat is the major rabi crop, which extends from November to April. The key to a much-needed improvement of productivity lies in a more efficient use of resources, principally land and water. However, change is dependent on the large landowners who own 40 percent of the arable land and control most of the irrigation system, which makes widespread reform difficult. Assessments by independent agencies, including the World Bank, show these large landholdings to be very unproductive. Pakistan is a net importer of agricultural commodities. Annual imports total about US$2 billion and include wheat, edible oils, pulses, and consumer foods. Pakistan is one of the world’s largest producers of raw cotton. The size of the annual cotton crop—the bulk of it grown in Punjab province—is a crucial barometer of the health of the overall economy, as it determines the availability and cost of the main raw material for the yarn-spinning industry, much of which is concentrated around the southern port city of Karachi. Official estimates put the 1999-2000 harvest at some 11. 2 million 170-kilogram bales, compared with the 1998-99 outturn of 8. 8 million bales and the record 12. 8 million bales achieved in 1991-92. The government recently actively intervened in the market to boost prices and to encourage production. A major problem is that the cotton crop is highly susceptible to adverse weather and pest damage, which is reflected in crop figures. After peaking at 2. 18 million tons in 1991-92, the lint harvest has since fluctuated considerably, ranging from a low of 1. 37 million tons in 1993-94 to a high of 1. 9 million tons in 1999-2000. The 2000-01 wheat crop was forecast at a record 19. 3 million tons, compared to 17. 8 million tons produced during the previous year. This increase is due largely to favorable weather and a 25-percent increase in the procurement price to about US$135 per ton. About 85 percent of the crop is irrigated. Despite the record production, Pakistan will continue to be a major wheat importer. The government has imported an average of US$2. 4 million annually over the past 5 years. The United States and Australia are the major suppliers. Demand for wheat is increasing from Pakistan’s rapidly growing population as well as from cross-border trade with Afghanistan. Pakistan is a major rice exporter and annually exports about 2 million tons, or about 10 percent of world trade. About 25 percent of exports is Pakistan’s famous fragrant Basmati rice. Rice is Pakistan’s second leading source of export earnings. Private traders handle all exports. Pakistan’s main competitors in rice trade are Thailand, Vietnam, and India. Tobacco is grown mainly in the North-West Frontier Province and Punjab and is an important cash crop . Yields in Pakistan are about twice those for neighboring countries largely due to the extension services provided by the industry. Quality, however, is improving only slowly due to problems related to climate and soil. Farmers have started inter-cropping tobacco with vegetables and sugarcane to increase returns. About half of the total production is used for cigarette manufacturing and the remainder used in traditional ways of smoking (in hand-rolled cigarettes called birris, in water pipes, and as snuff). The share of imported tobacco is increasing gradually in response to an increased demand for high-quality cigarettes. Minor crops account for only 5 percent of total cultivated area; these include oilseeds (sunflower, soybean), chilies, potatoes, and onions. Domestic oilseed production accounts only for about 25 percent of Pakistan total edible oil needs. As a result, Pakistan spends more than US$1 billion annually in scarce foreign exchange to import edible oils, while its oilseed processing industry operates at less than 25 percent of capacity due to an inadequate supply of oilseeds. For 2000-01 total oilseed production was forecast to decrease 10 percent to 3. 6 million tons. The government has highlighted development of the oilseed sector as a priority. Pakistan’s fishing industry is relatively modest, but has shown strong growth in recent years. The domestic market is quite small, with per capita annual consumption of approximately 2 kilograms. About 80 percent of production comes from marine fisheries from 2 main areas, the Sindh coast east from Karachi to the Indian border, and the Makran coast of Baluchistan. Ninety percent of the total marine catch is fish; the shrimp which constitute the remainder are prized because of their greater relative value and demand in foreign markets. During 1999-00, total fish production was 620,000 tons, of which 440,000 tons consisted of sea fish and the remainder were fresh-water species. About one-third of the catch is consumed fresh, 9 percent is frozen, 8 percent canned, and about 43 percent used as fish meal for animal food. Livestock accounts for 40 percent of the agricultural sector and 9 percent of the total GDP. Principal products are milk, beef, mutton, poultry, and wool. During 1999, the livestock population increased to 120 million head. That same year Pakistan generated 970,000 tons of beef, 640,000 tons of mutton, and 190,000 tons of poultry. In an effort to enhance milk and meat production, the government recently launched a comprehensive livestock development project with Asian Development Bank assistance. Poultry production provides an increasingly popular low-cost source of protein. Modern poultry production is constrained by high mortality, high incidence of disease, poor quality chicks, and poor quality feed, combined with an inadequate marketing system. Frozen poultry have only recently been introduced. Forests cover an area of 4. 2 million hectares or about 5 percent of the total area of Pakistan. The principal forest products are timber, principally for house construction, furniture, and firewood. Many of the country’s wooded areas are severely depleted as a result of over-exploitation. The government has restricted cutting to protect remaining resources—though corruption often jeopardizes environmental efforts—and has lowered duties to encourage imports. Forestry production has since declined from 1. 07 million cubic meters in 1990-91 to 475,000 cubic meters in 1998-99. Pakistan imports an estimated US$150 million of wood products annually to meet the requirements of a growing population and rising demand by a wealthy elite.

5 Strategies for Private School Admissions Test Prep

Most private schools require applicants to take a standardized test as part of the admission process. Essentially what the schools are trying to determine is how prepared you are for the academic work that they want you to be able to do. The most commonly used tests in independent schools are the SSAT and the ISEE, but ther are others that you may encounter. For example, Catholic schools use HSPTs and COOPs which are similar in content and purpose. If you think of the SSAT and ISEE like the college level SAT or its preparatory test, the PSAT, then you get the idea. The tests are organized in several sections, each designed to assess a specific skill set and knowledge level. Here are several tips to help you best prepare for this important exam. 1. Start Test Prep Early Begin final preparation for your admissions test in the spring for testing in the following fall. While these standardized tests measure what you have learned over the course of many years, you should begin working some practice tests in the spring and summer before you actually take the real thing in the late fall. There are several test prep books that you can consult.  Want some study tips? Check out this blog for some SSAT test prep strategies. 2. Dont Cram Last minute cramming is not going to be very productive when it comes to learning material you should have been learning over several years. The SSAT is designed to test what you have learned over time at school. Its not designed so that you have to learn new material, just master the material you have been learning in school. Instead of cramming, you might consider working hard in school and then during the last few weeks before the test, concentrate on three areas: know what is expectedtake practice testsreview subject material 3. Know the Test Format Knowing what is expected when you step through the door to the testing room is just as important as taking practice tests. Memorize the format of the test. Know what material will be covered. Learn all the variations in the way a question can be presented or worded. Think like the examiner. Paying attention to details like how youll take the exam and how it is scored can help you excel overall. Want more test prep strategies? Check out this blog on how to prepare for the SSAT and ISEE. 4. Practice Taking practice tests is critical to your success in these standardized tests. You have a certain number of questions which must be answered within a fixed time. So you must work to beat the clock. The best way to perfect your skills is to actually try to duplicate the test environment. Try to match the test conditions as closely as possible. Set aside a Saturday morning to work a practice test to the clock. Make sure that you do the practice test in a quiet room and have a parent present you the exam, just as if you were in the actual testing room. Imagine yourself in the room with dozens of your classmates taking the same test. No cell phone, snacks, iPod or TV. If you are really serious about honing your timing skills, you should repeat this exercise at least twice. 5. Review Reviewing subject material means exactly that. If you have pursued your studies in an organized manner, that  means pulling out those notes from a year ago and going over them carefully. Note what you didnt understand. Practice what you werent sure of by writing it out. Thats a common test prep strategy, writing things out, because for many people, this strategy will help them remember things better. As you practice and review, make a note of where you excel and where you need assistance, and then get help in the areas where you have deficiencies. If you plan to take the tests next year, understand the material now so that you can nail them. Dont put off thorough test preparation. Remember: you cannot cram for these tests. Article edited by  Stacy Jagodowski