Prof. Choh and his students are pursuing to decipher the evolutionary trend of Early Paleozoic carbonate facies.

They have been working on the microfacies analysis of the Early Paleozoic carbonates and the spatio-temporal trend of microbial to skeletal reefs of the Taebaek Group of Korea and adjacent regions.

Education

• - Phd, Geology, Dept. of Geological Sciences, Univ. of Texas at Austin (1997~2004)
• - MS, Geology, Dept. of Geology, Univ. of Louisiana at Lafayette (1995~1997)
• - BS, Geology, Dept. of Geology, Korea Univ. (1986~1991)

Professional experience

• - Department Chair, Dept. of Earth & Environmental Sciences, Korea Univ. (2013~2015; 2018~2020)
• - Professor, Dept. of Earth & Environmental Sciences, Korea Univ. (2017~present)
• - Associate Professor, Dept. of Earth & Environmental Sciences, Korea Univ. (2012~2017)
• - Assistant Professor, Dept. of Earth & Environmental Sciences, Korea Univ. (2005~2012)
• - Post Doctoral Fellow, Dept. of Geological Sciences, Univ. of Texas at Austin (2004~2005)

Award

• - 2019. 4 KU Teaching Excellence Award (석탑강의상) (A total of ten KU TEAs during 2008~2020)
• - 2008 Bronze Award, Innovation Instructional Technology for Web-based & Multimedia Learning, Univ. of Texas at Austin
• - 2001 SEPM Best Poster Award, American Association of Petroleum Geologists Annual Meeting at Denver

국제학술지

• Lee, J.-H., Cho, S. H., Jung, D., Choh, S.-J. and Lee, D.-J., 2021, Ribbon rocks revisited: upper Cambrian (Furongian) Hwajeol Formation, Taebaeksan Basin, Korea: Facies, 67, 19.

   

• Park, J., Lee, J.-H., Liang, K., Choh, S.-J., 2021, Facies analysis of the Upper Ordovician Xiazhen Formation, southeast China: Implications for carbonate platform development in South China prior to the onset of the Hirnantian glaciation: Facies, 67, 18.

   

• Cho, S. H., Lee, B.-S., Lee, D.-J., and Choh, S.-J., 2020, The Ordovician succession of the Taebaek Group (Korea) revisited: old conodont data, new perspective, and implications: Geosciences Journal, https://doi.org/10.1007/s12303-020-0044-5

   

• Jeon, J., Liang, K., Park, J., Choh, S.-J. and Lee, D.-J., 2020, Late Ordovician stromatoporoids from the Xiazhen Formation of South China: paleoecological and paleogeographical implications: Geological Journal, 55, 197-209.

   

• Jeon, J., Li, Q., Oh, J.-R., Choh, S.-J. and Lee, D.-J., 2019, A new species of the primitive stromatoporoid Cystostroma from the Ordovician of East Asia: Geosciences Journal, 23, 547-556.

   

• Kim, H.S., Choh, S.-J., Lee, J.-H. and Kim, S.J., 2019, Sediment grain size does matter: Implications of spatiotemporal variations in detrital zircon provenance for early Paleozoic peri-Gondwana reconstructions: International Journal of Earth Sciences, 108, 1509-1526.

   

• • Lee, M., Elias, R.J., Choh, S.-J., and Lee, D.-J., 2019, Disorientation of corals in Late Ordovician lime mudstone: a case for ephemeral biodegradable substrate?: Palaeogeography, Palaeoclimatology, Palaeoecology, 520, 55-65.

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• Lee, M., Elias, R.J., Choh, S.-J., and Lee, D.-J., 2019, Paleobiological features of coralomorph Amsassia from the Late Ordovician of South China: Alcheringa, 43, 18-32.

   

• Wang, Q., Want, Y. Qi, Y., Wang, X., Choh, S.-J., Lee, D.-C., and Lee, D.-J., 2018, Revised conodont and fusuline biostratigraphy of the Bamchi Formation (Pyongan Supergroup) at the Bamchi section, Yeongwol and the Carboniferous–Permian boundary in South Korea: Alcheringa, 42, 244-257.

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• Hong, J.S., Oh, J.R., Lee, J.-H., Choh, S.-J. and Lee, D.-J., 2018, The earliest evolutionary link of metazoan bioconstruction: laminar stromatoporoid-bryozoan reef from the Middle Ordovician of Korea: Palaeogeography, Palaeoclimatology, Palaeoecology, 492, 126-133.
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• Lee, J.-H., Choh, S.-J. and Lee, D.-J., 2018, Late Cambrian missing link in macroborer evolution found from “bored” intraclasts: Palaeogeography, Palaeoclimatology, Palaeoecology, 489, 137-146.
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• Lee, D.-C., Choh, S.-J., Lee, D.-J., Ree, J.-H., Lee, J.-H. and Lee, S.-B., 2017, Where art thou “the great hiatus?” – Review of Upper Ordovician to Devonian fossil-bearing strata in the Korean Peninsula and their tectonostratigraphic implication: Geosciences Journal, 21, 913-931.
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• Zhang, M., Hong, J.S., Choh, S.-J. and Lee, D.-J., 2017, Thrombolite reefs with archaeocyaths of the Xiannudong Formation (middle Cambrian Series 2), Sichuan, China: implications for early Paleozoic bioconstruction: Geosciences Journal, 21, 655-666.
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• Jeon, J., Park, J., Choh, S.-J. and Lee, D.-J., 2017, Early labechiid stromatoporoids of the Yeongheung Formation (Middle Ordovician), Yeongwol Group, mideastern Korean Peninsula: Part II. Systematic paleontology and paleogeographic implications: Geosciences Journal, 21, 331-340.
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• Park, J., Hong, J.S., Lee, J.-H., Choh, S.-J. and Lee, D.-J., 2017, Early labechiid stromatoporoids of the Yeongheung Formation (Middle Ordovician), Yeongwol Group, mideastern Korean Peninsula: Part I. Environmental distribution: Geosciences Journal, 21, 317-329.
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• Hong, J.S., Choh, S.-J., Park, J. and Lee, D.-J., 2017, Construction of the earliest stromatoporoid framework: labechiid reefs from the Middle Ordovician of Korea: Palaeogeography, Palaeoclimatology, Palaeoecology, 470, 54-62.
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• Park, J., Hong, J.S., Lee, J.-H., Choh, S.-J., Lee, D.-C. and Lee, D.-J., 2017, Crouching shells, hidden sponges: Unusual Late Ordovician cavities containing sponges: Sedimentary Geology, 347, 1-9.
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• Lee, J.-H., Kim, B.-J., Liang, K., Park T.-Y., Choh, S.-J., Lee, D.-J., Woo, J., 2016, Cambrian reefs in the western North China Platform (Wuhai, Inner Mongolia): Acta Geoscience Sinica, 90, 1946-1954.
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• Lee, M., Elias, R.J., Choh, S.-J., and Lee, D.-J., 2016, Insight from early coral-stromatoporoid intergrowth, Late Ordovician of China: Palaeogeography, Palaeoclimatology, Palaeoecology, 463, 192-204.
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• Liang, K., Elias, R.J., Choh, S.-J., Lee, D.-C. and Lee, D.-J., 2016, Morphometrics and paleoecology of Catenipora (Tabulata) from Xiazhen Formation (Upper Ordovician), Zhuzhai, South China: Journal of Palaeontology, 90, 10287-1048.
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• Lee, J.-H., Hong, J.S., Lee, D.-J. and Choh, S.-J., 2016, A new Middle Ordovician reef-building consortium of bivalve-siliceous sponge-microbe from North China: Palaeogeography, Palaeoclimatology, Palaeoecology, 457, 23-30.
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• Chen, Z., Kim, M.-H., Choh, S.-J., Lee, D.J. and Chen X., 2016, Discovery of Anticostia uniformis from the Xiazhen Formation at Zhuzhai, South China and its stratigraphic implication: Paleoworld, 25, 356-361.
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• Lee, J.-H., Hong, J.S., Choh, S.-J., Lee, D.-J., Woo, J. and Riding, R., 2016, Early recovery of sponge framework reefs after Cambrian archaeocyath extinction: Palaeogeography, Palaeoclimatology, Palaeoecology, 457, 269-276.
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• Hong, J.S., Lee, J.-H., Choh, S.-J. and Lee, D.-J., 2016, Cambrian Series 3 carbonate platform of Korea dominated by microbial-sponge reefs: Sedimentary Geology, 341, 58-69.
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• Park, T.-Y., Kihm, J.-H., Woo, J., Zhen, Y.-Y., Engelbretsen, M., Hong, J.S., Choh, S.-J. and Lee, D.-J., 2016, Cambrian stem-group cnidarians and a new species of stem-group cnidarian from the Cambrian Series 3 of the Taebaeksan Basin, Korea: Acta Geoscience Sinica, 90, 827-837.
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• Lee, M., Park, H., Tien, N.V., Choh, S.-J., Elias, R.J., and Lee, D.-J., 2016, A new species of Amsassia from the Ordovician of Korea and China: paleobiological and paleogeographical significance: Acta Geoscience Sinica 90, 796-806.
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• Hong, J.S., Choh, S.-J. and Lee, D.-J., 2016, Distribution of chancelloriid in middle Cambrian carbonate platform deposit, Taebaek Group, Korea: Acta Geoscience Sinica, 90, 783-795.
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• Ree, J.-H., Choh, S.-J., Jung, H. and Lee, D.-J., 2016, Re-examination of a supposed ‘Archaeocyatha’ specimen of the Hyangsanni Formation, Okcheon Basin, Korea: Geosciences Journal, 20, 285-294.
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• Sun, N., Elias, R.J., Choh, S.-J., Lee, D.-C., Wang X.-L. and Lee, D.-J., 2016, Morphometrics and palaeoecology of the coral Agetolites from Xiazhen Formation (Upper Ordovician), Zhuzhai, South China: Alcheringa, 40, 251-274.
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• Lee, J.-H., Hong, J.S., Woo, J., Oh, J.-R., Lee, D.-J., Choh, S.-J., 2016, Reefs in the early Paleozoic Taebaek Group, Korea: a review: Acta Geoscience Sinica, 90, 352-367.
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• Park, J., Lee, J.-H., Hong, J.S., Choh, S.-J., Lee, D.-C. and Lee, D.-J., 2015, An Upper Ordovician sponge-bearing micritic limestone and implication for early Palaeozoic carbonate successions: Sedimentary Geology, 319, 124-133.
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• Hong, J.S., Choh, S.-J. and Lee, D.-J., 2015, Untangling intricate microbial-sponge frameworks: the contributions of sponges to Early Ordovician reefs: Sedimentary Geology, 318, 75-84.
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• Oh, J.-R., Choh, S.-J. and Lee, D.-J., 2015, First report of Cystostroma stromatoporoid from Sino-Korean Block: Geosciences Journal, 19, 25-31.
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• Lee, M., Sun, N., Choh, S.-J. and Lee, D.-J., 2014, A new Middle Ordovician reef assemblage from north-central China and its palaeobiogeographical implications: Sedimentary Geology, 310, 30-40.
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• Hong, J.S., Choh, S.-J. and Lee, D.-J., 2014, Tales from the crypts: early adaptation of cryptobiontic sessile metazoan: Palaios, 29, 95-100.
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• Lee, J.-H., Chen, J., Choh, S.-J., Lee, D.-J., Han, Z. and Chough, S.K., 2014, Furongian (Late Cambrian) sponge-microbial maze-like reefs in the North China Platform: Palaios, 29, 27-37.
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• Choh, S.-J., Hong, J.S., Sun, N., Kwon, S.W., Park, T.-Y., Woo, J., Kwon, Y.K., Lee, D.C., and Lee, D.-J., 2013, Early Ordovician reefs from the Taebaek Group, Korea: Constituents, types, and geological implications: Geosciences Journal, 17, 139-149.
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• Choi, B.Y., Yun, S.T., Kim, K.H., Kim, K. and Choh, S.-J., 2013, Geologically controlled agricultural contamination and water-rock interaction in an alluvial aquifer: results from a hydrochemical study: Environmental Earth Sciences, 68, 203-217.
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• Lee, D.-C., Park, J., Woo, J., Kwon, Y.K., Lee, J.-G., Guan, L., Sun, N., Lee, S.-B., Liang, K., Liu, L., Rhee, C.-W., Choh, S.-J., Kim, B.-S. and Lee, D.-J., 2012, Revised stratigraphy of the Xiazhen Formation (Upper Ordovician) at Zhuzhai, South China, with its implication for regional stratigraphy and paleogeography: Alcheringa, 36, 387-404.
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• Kwon, S.W., Park, J., Choh, S.-J., Lee, D.-C. and Lee, D.-J., 2012, Tetradiid-sponge buildups from the Xiazhen Formation (late Katian), southeast China: a new Late Ordovician buildup consortium: Sedimentary Geology, 267-268, 15-24.
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• Hong, J.S., Cho, S.H., Choh, S.-J., Woo, J. and Lee, D.-J., 2012, Siliceous sponge-calcimicrobe buildups of the Daegi Formation (Middle Cambrian), Korea: Sedimentary Geology, 253-254, 47-57.
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• Jo, H.Y., Kim, J.H., Lee, Y.J., Lee, M. and Choh, S.-J., 2012, Evaluation of factors affecting mineral carbonation of CO2 using coal fly ash in aqueous solutions under ambient conditions: Chemical Engineering Journal, 183, 77-87.
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• Choh, S.-J. and B.L. Kirkland, 2008, Sedimentologic role of in situ Beresellid algal colonies, Holder Formation (Upper Pennsylvanian), New Mexico, U.S.A.: Carbonates and Evaporites, 23, 79-88.
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• Milliken, K.L., Choh, S.-J., Papazis, P.K. and Schieber, J., 2007, “Cherty” stringers in the Barnette Shale are agglutinated foraminifera: Sedimentary Geology, 198, 221-232.
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• Choh, S.-J. and Kirkland, B.L., 2006, Sedimentologic roles of microproblematica Donezella in a lower Pennsylvanian Donezella–siliceous sponge dominated carbonate buildup, frontal Ouachita thrust belt, Oklahoma, USA: Journal of Sedimentary Research, 76, 152-161.
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• Choh, S.-J, K.L. Milliken, 2004, Virtual carbonate thin section using PDF: New method for interactive visualization and archiving: Carbonates and Evaporites, 19, 87-92.
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• Choh, S.-J, K.L. Milliken, E.F. McBride, 2003, A tutorial for sandstone petrology: architecture and development of an interactive program for teaching highly visual material: Computers & Geosciences, 29, 1127-1135.
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• Milliken, K.L., J.P. Barufaldi, E.F. McBride, and S.-J. Choh, 2003, Design and assessment of an interactive digital tutorial for undergraduate-level sandstone petrology: Journal of Geoscience Education, 51, 381-386.

국내학술지

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• 조성권, 이동진, 이진한, 조석주, 우주선, 2016, “태백산분지에 분포하는 장산층의 퇴적시기 및 암석 특성 재고찰”에 대한 반론: 지질학회지, 52, 961-967.
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• 최용미, 조석주, 이정현, 이동찬, 이정구, 권이균, 조림, 이동진, 2015, 임진강대의 중부 고생대층: 임진계: 암석학회지, 24, 107-124.
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• 성영배, 이진한, 조석주, 이홍종, 2013, 범람원에서 발견된 적색밴드에 대한 미세구조 특성: 고고학 유적층을 사례로: 한국지형학회지, 20. 41-52.
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• 이동진, 최용미, 이동찬, 이정구, 권이균, 조림, 조석주, 2013b, 평남분지의 하부와 중부 고생대층: 상서리통과 곡산통: 지질학회지, 49. 181-195.
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• 이동진, 최용미, 이동찬, 이정구, 권이균, 조림, 조석주, 2013a, 평남분지의 하부와 중부 고생대층: 송림역암의 고지리적 의의: 지질학회지, 49. 5-15.

저서

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• Milliken, K.L., and Choh, S.-J., 2011, Carbonate Petrology 1.0 multimedia DVD-ROM: American Association of Petroleum Geologists/Datapages Discovery Series, No.15, Tulsa, Oklahoma (ISBN: 1588613976)
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• Milliken, K.L., Choh, S.-J. and McBride, E.F., 2007, Sandstone Petrology 2.0 multimedia CD-ROM: American Association of Petroleum Geologists/Datapages Discovery Series No. 10, Tulsa, Oklahoma (ISBN: 1588610098).
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• Milliken, K.L., S.-J. Choh, and E.F. McBride, 2002, Sandstone Petrology: A tutorial petrographic image atlas multimedia CD-ROM: American Association of Petroleum Geologists/Datapages Discovery Series No. 6, Tulsa, Oklahoma (ISBN: 1588610055).

Research Topics

• 1. Evolution of Cambrian-Ordovician carbonate platform and facies
• 2. Spatio-temporal trend of Early Paleozoic reefs
• 3. Nonconventional reservoirs

Undergraduate Course

• - EAES152 지구환경과학 및 연습II (General Earth Sciences II)
• - EAES307 퇴적시스템 (Sedimentary System)
• - EAES312 석유지질학 (Petroleum Geology)
• - EAES414 야외지질학 실습 (Field Geology)