Results 121 to 130 of about 5,095 (245)

Tephrochronology of Bed II, Olduvai Gorge, Tanzania, and placement of the Oldowan-Acheulean transition.

Journal of Human Evolution, 2018
Tuffaceous marker beds, derived from volcanic products from the Ngorongoro Volcanic Highlands, help define a stratigraphic framework for the world-renowned fossil and stone tool record exposed at Olduvai Gorge, Tanzania.
L. McHenry, I. Stanistreet
semanticscholar   +1 more source

Historical and paleo-tsunami deposits on Kamchatka, Russia: long-term chronologies and long-distance correlations [PDF]

Natural Hazards and Earth System Sciences, 2001
Along the eastern coast of Kamchatka, at a number of localities, we have identified and attempted to assign ages to deposits of both historic and prehistoric (paleo-) tsunamis.
T. K. Pinegina, J. Bourgeois
doaj  

Some Basic Problems in Tephrochronology

The Quaternary Research (Daiyonki-Kenkyu), 1972
So much tephra deposits which are popularly called “Loam” or “Brown ash”, obscure discrimination of particular tephra layer from many others within the Quaternary section in Japan. Detailed description in petrography and in lithology is therefore needed for characterizing any particular tephra layers.
openaire   +2 more sources

The Fucino 250–170 ka tephra record: New insights on peri-Tyrrhenian explosive volcanism, central mediterranean tephrochronology, and timing of the MIS 8-6 climate variability

Quaternary Science Reviews, 2022
L. Monaco, N. Leicher, D. Palladino, I. Arienzo, F. Marra, M. Petrelli, S. Nomade, A. Pereira, G. Sottili, S. Conticelli, M. D’Antonio, A. Fabbrizio, B. Jicha, G. Mannella, P. Petrosino, E. Regattieri, P. Tzedakis, B. Wagner, G. Zanchetta, B. Giaccio   +19 more
semanticscholar   +1 more source

Re-identification of c. 15 700 cal yr BP tephra bed at Kaipo Bog, eastern North Island: implications for dispersal of Rotorua and Puketarata tephra beds. [PDF]

, 2003
A 10 mm thick, c. 15 700 calendar yr BP (c. 13 100 14C yr BP) rhyolitic tephra bed in the well-studied montane Kaipo Bog sequence of eastern North Island was previously correlated with Maroa-derived Puketarata Tephra.
Froggatt P. C., Kilgour G. N., Lloyd E. F., Lowe D. J., Lowe D. J., Nairn I. A., Pullar W. A., Righter K., Stuiver M., Topping W. W., Wilson C. J. N.   +10 more
core   +2 more sources

Scour ponds from unusually large tsunamis on a beach-ridge plain in eastern Hokkaido, Japan. [PDF]

Sci Rep, 2023
Sawai Y, Tamura T, Shimada Y, Tanigawa K.   +3 more
europepmc   +1 more source

The Qixiangzhan eruption, Changbaishan-Tianchi volcano, China/DPRK: new age constraints and their implications. [PDF]

Sci Rep, 2022
Pan B, de Silva SL, Danišík M, Schmitt AK, Miggins DP.   +4 more
europepmc   +1 more source

Tephrochronology and Absolute Age Determination

The Quaternary Research (Daiyonki-Kenkyu), 1967
Most tephrochronological studies based upon absolute ages are derived from historical records of eruption and radiocarbon dates from Holocene and Pleistocene times. However, unless associated with some organic matters whose ages are younger than 35, 000 years old, tephra layers usually could not be dated.Recently Kigoshi explored the possibility that ...
openaire   +2 more sources

Reservoirs and radiocarbon: ¹⁴C dating problems in Myvatnssveit, Northern Iceland [PDF]

, 2007
This paper examines 2 potential sources of the radiocarbon offset between human and terrestrial mammal (horse) bones recovered from Norse (~AD 870–1000) pagan graves in Mývatnssveit, north Iceland.
Ascough, P.L., Church, M.J., Cook, G.T., Dugmore, A.J., Dunbar, E., Einarsson, E., Frioriksson, A., Gestsdottir, H., McGovern, T.G.   +8 more
core  

Geomorphological processes on terrestrial planetary surfaces [PDF]

, 1980
This review deals with features and processes on planetary surfaces, first by examining the impact of photographic explorations of Moon, Mars, and Mercury on studies of surface processes on our own planet, and second by treating matters related to ...
Sharp, Robert P.
core   +1 more source