Amos Frumkin

Amos Frumkin (Hebrew: עמוס פרומקין; born in 1953) is an Israeli geologist, speleologist, and professor of geology at the Hebrew University of Jerusalem.

Frumkin was born in Tel Aviv, Israel, in 1953. His expertise is the geology of caves. As an active speleologist, he founded and directs the Cave Research Center of the Hebrew University in Jerusalem.

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.^{[citation needed]}

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.^{[citation needed]}

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. ^{[citation needed]}

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. ^{[citation needed]}

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). ^{[citation needed]}

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. ^{[citation needed]}