Amos Frumkin (; born in 1953) is an Israeli geologist, speleologist, and professor of geology at the Hebrew University of Jerusalem.Stefan Lovgren, Jerusalem Tunnel Linked to Bible, National Geographic News, 11 September 2003
Frumkin was born in Tel Aviv, Israel, in 1953. His expertise is the geology of caves.Aron Heller, Scientists Discover 8 New Species, The Associated Press, 1 June 2006 As an active speleologist, he founded and directs the Cave Research Center of the Hebrew University in Jerusalem.
Research Frumkin's research fields cover karst, cave morphology, environment, and sediments, as indicators of palaeoclimate, palaeohydrology, geological history, tectonics, karst aquifers and human evolution. He also studies underground ancient water supply systems. He uses earth-sciences methods, such as radiometric dating and stable isotopes, collaborating with archaeologists, biologists and karstologists around the globe. He has authored or co-authored over 100-refereed articles and seven books.
Frumkin's Ph.D. thesis on "The karst system of the Mount Sedom salt diapir" focused on karst geomorphology and hydrology of this salt diapir, and its palaeoclimatic implications. This was the first karst research performed in salt.
Most of Frumkin's studies are performed on karst terrains in diverse fields of research, comprising palaeoclimate, geomorphology, hydrology, palaeohydrology, geoarchaeology, human impact on the environment and ancient water systems. The research is mostly associated with underground (speleological) features studied using earth-sciences methods. He studies the underground interface between geoscience, geography, environment, and archaeology. An interdisciplinary and trans-disciplinary view of the sub-surface is achieved by wide-scale interaction and cooperation with scientists in various fields. The research has been performed mainly in Israel, complemented with research in other countries such as Jordan, United Emirates, and Bulgaria. Additional collection of data is done over the globe, resulting in a global karst geomorphology volume. Some of the research is performed in underground laboratories in which measuring equipment was installed. Within an underground laboratory in Sedom Cave, salt cave speleogenetic processes are monitored for since 1980’s. Much of the data collection is performed by graduate students.
Caves are treated as living organisms, with birth (initiation, inception), complex life history involving hydrogeologic, palaeoclimatic, biologic and anthropogenic processes, culminating in cave 'death' during which the cave is obliterated by filling or erosion. All these stages and processes are tackled in Frumkin’s studies.
His data and interpretation often changed the previously accepted paradigm, becoming the new, widely accepted 'common knowledge'. For example: (a) Oxygen isotopes fluctuations over glacial/interglacial periods in Levantine speleothems are dominated by 'source effect', consequently glacials were wetter than interglacials (rather than drier as was thought earlier, according to oxygen isotopes); (b) Hypogenic source of the 'Ayyalon salinity anomaly' (rather than an upper source); (c) Salt dissolution as the major undermining source of Dead Sea sinkholes (rather than earlier piping concept); (d) Natural caves have been widely used for refuge in the Mediterranean zone of Israel (rather than only in the desert); (e) Speleothems have been used in Israel in the past for production of 'calcite alabaster' luxury items (rather than only imported from Israel).
Karst Frumkin studies the recharge vadose zone at the mountains in central Israel, concentrating on recharge through karst shafts and cave drips injecting water and potentially pollution into the aquifer. The integration of recharge over catchment areas is studied using spring monitoring and models. Much of the research is focused in the phreatic, confined and hypogenic parts of the aquifers. It is found that most 's carbonate caves have initiated and developed to full size under such conditions. Aging and dying stages of cave life are studied through excavations in filled caves.
Caves preserve unique records of the geological history of their region. They form along structural lines, they are deformed and uplifted with the rock, and they preserve ancient sediments with geological records. Frumkin studied such features of tectonics, diapir rising rates and morphostructure of the Dead Sea basin and its shoulders.
Palaeoclimate Frumkin has obtained detailed well-dated climatic records for the mid-late Quaternary in Israel. The results solve some important questions on climate change during the Quaternary in the Levant and other regions, and how it could/would influence humans, and the nature of climatic belts migration during glacial/interglacial cycles. The answers obtained have direct impact on understanding present and future climatic change. The palaeoclimatic studies were extended to lava tubes in Jordan, ancient wood preserved in caves, and to stromatolite caves in the Dead Sea basin. Paleoclimate records were obtained for various climatic regions, from Mt. Hermon, where freezing and thawing periods were reconstructed, through the northern-central Dead Sea catchment, where glacials were shown to be wetter than interglacials. The last interglacial was shown to be extreme in several ways, indicating possible scenarios of future warming. Environmental catastrophes during the Holocene received particular attention, due to their relevance to present and future global change.
Geoarchaeology Among the co-authored studies are: Dating of early Paleolithic cave inhabitants; evidence for habitual use of fire at the end of the Lower Paleolithic; paleoclimatic corridors for human migration out of Africa; dating ancient Jerusalem water supply system; technical innovations to bring water into ancient cities; Extending the knowledge on Bar-Kokhba Revolt, ~1900 yr ago, through remains including papyrus documents and hoards of coins from caves; Comparing field evidence with historic and archaeologic records. In 2003, Frumkin led a team that radiometrically-dated Siloam Tunnel. He is the author of the generally accepted explanation of how a tunnel dug by two teams working from opposite ends was engineered by the ancient Israelites before the development of trigonometry.Frumkin, Amos and Shimron, Aryeh, Tunnel engineering in the Iron Age: Geoarchaeology of the Siloam Tunnel, Jerusalem, Journal of Archaeological Science, vol. 33, no. 2, February 2006, Pages 227-237. He found for the first time that calcite-alabaster was produced in Israel and not only imported from Egypt.
External links Amos Frumkin at the Institute of Earth Sciences, The Hebrew University of Jerusalem Amos Frumkin at Academia.edu Israel Cave Research Center
Published works Books Frumkin, A. 1984, Karst Shafts in a Mediterranean Environment (Hebrew): Jerusalem, The Hebrew University of Jerusalem and the Society for the Protection of Nature in Israel, Jerusalem, 141 pp. Frumkin, A., 1992. The karst system of . (Hebrew):, The Hebrew of and the Society for the Protection of Nature in Israel, 216 pp. Donini, G., Rossi, A., Forti, P., Buzio, A., Calandri, G. and Frumkin, A., 1985, Monte Sedom, Societa Speleologica Italiana, Milano, 135 p. Rubin, R., Frumkin, A. and Felsenstein, D., 1999, Multifaces of Geography (Hebrew): Ariel v. 140-141, 383 p. Frumkin, A., 2006, Proceedings of the Geographical Society Conference (Hebrew), 116 p. Frumkin, A., ed., Shroder J.F. ed. in chief, 2013, Karst Geomorphology, Volume 6, in: Treatise on Geomorphology, San Diego, Elsevier, Academic Press, 483 p. Frumkin, A., ed., 2015, Atlas of the Holey Land - Judean Desert Caves. Magnes, 458 pp (Hebrew). Chavez, T., Reehling, P., Johnston, C., Klimchouk, A., Frumkin, A., eds., 2016: Proceedings of deepkarst 2016: origins, resources, and management of hypogene karst. National cave and karst research institute Symposium 6 Carlsbad, NM, USA
Refereed journal papers Frumkin, Amos and Shimron, Aryeh, Tunnel engineering in the Iron Age: Geoarchaeology of the Siloam Tunnel, Jerusalem, Journal of Archaeological Science, vol. 33, no. 2, February 2006, Pages 227-237. Frumkin, A., Magaritz, M., Carmi, I. and Zak, I., 1991, The Holocene climatic record of the salt caves of Mount Sedom, Israel: Holocene, v. 1, 3, p. 191-200. Frumkin, A., 1993, Karst origin of the upper erosion surface in the Northern Judean Mountains, Israel: Israel Journal of Earth Sciences, v. 41, p. 169-176. Frumkin, A., 1994, Hydrology and denudation rates of halite karst: Journal of Hydrology, v. 162, 1-2, p. 171-189. Frumkin, A., 1994, Morphology and development of salt caves: Journal of Caves and Karst Studies (NSS Bull.), v. 56, p. 82-95. Frumkin, A., Schwarcz, H. P. and Ford, D. C., 1994, Evidence for isotopic equilibrium in stalagmites from caves in a dry region: Jerusalem, Israel: Israel Journal of Earth Sciences, v. 43, 3-4, p. 221-230. Frumkin, A. and Ford, D. C., 1995, Rapid entrenchment of stream profiles in the salt caves of Mount Sedom, Israel: Earth Surface Processes and Landforms, v. 20, p. 139-152. Frumkin, A., 1996, Determining the exposure age of a karst landscape: Quaternary Research, v. 46, p. 99-106. Frumkin, A., 1996, Structure of northern Mount Sedom salt diapir (Israel) from cave evidence and surface morphology: Israel Journal of Earth Sciences, v. 45, p. 73-80. Frumkin, A., 1996, Uplift rate relative to base level of a salt diapir (Dead Sea, Israel), as indicated by cave levels, in Alsop, I., Blundell, D. and Davison, I., eds., Salt Tectonics, Geological Society of London SP v. 100, p. 41-47. Frumkin, A., 1998, Salt cave cross-sections and their paleoenvironmental implications: Geomorphology, v. 23, p. 183-191. Frumkin, A., Shimron, A. E. and Miron, Y., 1998, Karst morphology across a steep climatic gradient, southern Mount Hermon, Israel: Zeitschrift für Geomorphologie Supplementband, v. 109, p. 23-40. Frumkin, A., 1999, Interaction between karst, water, and agriculture over the climatic gradient of Israel: International Journal of Speleology, v. 28B, 1, p. 99-110. Frumkin, A., Carmi, I., Gopher, A., Ford, D.C., Schwarcz, H.P. and Tsuk, T., 1999. A Holocene millennial-scale climatic cycle from a speleothem in Nahal Qanah Cave, Israel. The Holocene, 9(6), pp. 677–682. Frumkin, A., Ford, D. C. and Schwarcz, H. P., 1999, Continental oxygen isotopic record of the last 170,000 years in Jerusalem: Quaternary Research, v. 51, 3, p. 317-327. Frumkin, A., Ford, D. C. and Schwarcz, H. P., 2000, Paleoclimate and vegetation of the last glacial cycles in Jerusalem from a speleothem record: Global Biogeochemical Cycles, v. 14, 3, p. 863-870. Frumkin, A., 2001, The Cave of the Letters sediments — Indication of an early phase of the Dead Sea depression?: Journal of Geology, v. 109, 1, p. 79-90. Frumkin, A. and Elitzur, Y., 2001, The Rise and Fall of the Dead Sea: Biblical Archaeology Review, v. 27, 6, p. 42-50.The Rise and Fall of the Dead Sea, Amos Frumkin and Yoel Elitzur, BAR 27:06, Nov/Dec 2001 Frumkin, A., Kadan, G., Enzel, Y., and Eyal, Y., 2001, Radiocarbon chronology of the Holocene Dead Sea: Attempting a regional correlation: Radiocarbon, v. 43, 2C, p. 1179-1190. Frumkin, A. and Raz, E., 2001, Collapse and subsidence associated with salt karstification along the Dead Sea: Carbonates and Evaporites, v. 16, 2, p. 117-130. Frumkin, A., 2002, The hydrogeology of Israel and the problem of water supply in antiquity: Journal of Roman Archaeology SS, v. 46, p. 21-24 (review). Frumkin, A. and Elitzur, Y., 2002, Historic Dead Sea level fluctuations calibrated with geological and archaeological evidence: Quaternary Research, v. 57, p. 334-342. Frumkin, A., 2002, The water-supply network of Samaria-Sebaste: The Aqueducts of Israel, Amit, D., Patrich, J., Hirschfeld, Y., Eds., Journal of Roman Archaeology SS, v. 46, p. 267-277.