Results 91 to 100 of about 92,675 (274)

Stratigraphy and geomorphology of Des‐Cubierta Cave (Pinilla del Valle, Madrid, Spain): Geological insights into a Neanderthal symbolic accumulation of large crania

Journal of Quaternary Science, EarlyView.
ABSTRACT Des‐Cubierta Cave, part of the Calvero de la Higuera complex, is situated in the intramountainous upper valley of the Lozoya River within the Guadarrama Range. The cave's geological, palaeontological, and archaeological record reveals a complex history of sedimentary and anthropogenic processes spanning hundreds of thousands of years ...
David Manuel Martín‐Perea, Enrique Baquedano, Juan Luis Arsuaga, César Laplana, Ana Isabel Ortega, Lucía Villaescusa, Belén Márquez, Rosa Huguet, Abel Moclán, Sandra Gómez Soler, Xabier Arroyo, Laura Rodríguez, Rebeca García‐González, M. Cruz Ortega, Jesús Masa‐Andrés, Diego J. Álvarez‐Lao, Nuria García, M. Ángeles Galindo‐Pellicena, Tom Higham, Alfredo Pérez‐González   +19 more
wiley   +1 more source

The stratigraphy, correlation, provenance and palaeogeography of the Skiddaw Group (Ordovician) in the English Lake District [PDF]

, 1995
A new lithostratigraphy is presented for the Skiddaw Group (lower Ordovician) of the English Lake District. Two stratigraphical belts are described. Five formations are defined in the Northern Fells Belt, ranging in age from Tremadoc to early Llanvirn.
Cooper, A.H., Hughes, R.A., Molyneux, S.G., Moore, R.M., Rushton, A.W.A., Webb, B.C.   +5 more
core   +1 more source

The Bronze Age Tombs of Northwest Arabia: A Chrono‐Typological Study From AlUla and Khaybar, Saudi Arabia

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT Northwest Arabia is marked by tens of thousands of monumental burial structures, most of which appear to have been built during the Bronze Age. These funerary features range from simple cairns and tower tombs through to large ‘pendant’ burials with elaborate tail constructions.
Hugh Thomas, Jane McMahon, Lauren Swift, Daniel Franklin, Fahad Bagdadi, Rudolph Alagich, Melissa Kennedy   +6 more
wiley   +1 more source

Palaeozoic correlations and the Palaeogeography of the Sibumasu (Shan-Thai) Terrane - a brief review [PDF]

Research & Knowledge, 2016
Furongian sandstones yield shallow-water trilobite faunas along the length of the Sibumasu Terrane in the four regions of NW Malaysia (Langkawi), southern Thailand (Satun), the Shan States of Myanmar and the Baoshan Block of western Yunnan.
Clive Burrett, Mongkol Udchachon, Hathaithip Thassanapak   +2 more
doaj   +1 more source

Fragments of the earliest land plants [PDF]

, 2003
The earliest fossil evidence for land plants comes from microscopic dispersed spores. These microfossils are abundant and widely distributed in sediments, and the earliest generally accepted reports are from rocks of mid-Ordovician age (Llanvirn, 475 ...
CH Wellman, CH Wellman, CH Wellman, D Edwards, D Edwards, D Edwards, D Edwards, D Edwards, D Edwards, DL Nickrent, E Pacini, HHJ Droste, HP Banks, J Gray, J Gray, JB Richardson, LE Graham, P Kenrick, P Kenrick, P Steemans, PK Strother, RC Brown, SB Kroken, WA Taylor, WA Taylor, YL Qiu   +25 more
core   +1 more source

Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]

, 2020
In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan, Mikhailova, Polina, Nachtergaele, Simon, Van Ranst, Gerben, Vetrov, Evgeny, Vetrova, Natalia, Zhimulev, Fedor   +6 more
core   +1 more source

Automatic identification of streamlined subglacial bedforms using machine learning: an open‐source Python approach

Boreas, EarlyView.
Morphometric values of streamlined subglacial bedforms provide valuable information about the relative speed, direction, and maturity of past ice streams. This paper presents a new tool that utilizes a machine learning approach to automatically identify glacially derived streamlined features.
Ellianna Abrahams, Marion McKenzie, Fernando Pérez, Ryan Venturelli   +3 more
wiley   +1 more source

Main constrains and dynamic process of Ordovician hydrocarbon accumulation, central and western Tahe Oil Field, Tarim Basin

Shiyou shiyan dizhi, 2021
Diversified types of oil and gas resources have been discovered in the Ordovician strata of central and western parts of the Tahe Oil Field, Tarim Basin.
Yongqiang ZHAO, Lu YUN, Bin WANG, Feng GENG, Haiying LI, Yi GU, Yongli LIU   +6 more
doaj   +1 more source

The morphosedimentary record of glacial to postglacial environmental changes in West Wiyâshâkimî impact crater lake and adjacent areas, northern Québec, Canada

Boreas, EarlyView.
Crater lakes in core regions of former ice sheets have the potential to preserve long‐term sedimentary archives that are otherwise rare in glaciated landscapes due to pervasive glacial erosion. Lake Wiyâshâkimî, an impact crater lake located in the inner core of the Québec‐Labrador Dome of the Laurentide Ice Sheet, provides a rare example of such a ...
Etienne Brouard, Patrick Lajeunesse
wiley   +1 more source

Kinetics of oil-cracking of ultra-deep Ordovician oil in the North Shuntuoguole area of Tarim Basin and its geological implications

Shiyou shiyan dizhi, 2021
With the expansion to the deep strata for the exploration of marine oil and gas in the Tarim Basin, the upper limit of temperature for the occurrence of ultra-deep reservoirs has become a scientific concerning of organic geochemistry and petroleum ...
Huili LI, Anlai MA, Xunyu CAI, Huixi LIN, Jianjiao LI, Jinzhong LIU, Xiuxiang ZHU, Xian WU   +7 more
doaj   +1 more source