Results 71 to 80 of about 313 (146)

Origins of the sarsen megaliths at Stonehenge. [PDF]

Sci Adv, 2020
Nash DJ, Ciborowski TJR, Ullyott JS, Pearson MP, Darvill T, Greaney S, Maniatis G, Whitaker KA.   +7 more
europepmc   +1 more source

Dating ofsilcretes through opals with uranium. A preliminary studyin the Miocene, Paracuellos de Jarama area (Madrid Basin)

, 2010
U-Pb-series analyses of two U-rich opal samples have been used for dating silcretes included in Miocene rocks in the Paracuellos zone (Madrid Basin.) A sensitive high-resolution ion microprobe (SHRIMP) was used.
Nemchin, Alexander A., Pérez Jiménez, José Luis, Bustillo Revuelta, María Ángeles, Alonso Zarza, Ana María   +3 more
core  

Serpentine alteration as source of high dissolved silicon and elevated δ³⁰Si values to the marine Si cycle. [PDF]

Nat Commun, 2020
Geilert S, Grasse P, Wallmann K, Liebetrau V, Menzies CD.   +4 more
europepmc   +1 more source

Silicification in Cainozoic landscapes of arid Australia

, 1983
Silica diagenesis in subdued Tertiary drainage landscapes in the arid interior of Australia produced a mosaic of silcretes now exposed as relict duricrust on mesas that are significantly higher than the contemporary base-level of erosion.
Milnes, A.R.
core  

Burrow systems evince non-solitary geomyid rodents from the Paleogene of southern Mexico. [PDF]

PLoS One, 2020
Guerrero-Arenas R, Jiménez-Hidalgo E, Genise JF.   +2 more
europepmc   +1 more source

A diverse Late Cretaceous vertebrate tracksite from the Winton Formation of Queensland, Australia. [PDF]

PeerJ, 2021
Poropat SF, White MA, Ziegler T, Pentland AH, Rigby SL, Duncan RJ, Sloan T, Elliott DA.   +7 more
europepmc   +1 more source

Aspects of English silcretes and comparison with some Australian occurrences: comment.

, 2000
Hepworth, J. V., Catt, J. A.
core   +1 more source

Author Correction: Early human occupation of Australia's eastern seaboard. [PDF]

Sci Rep
Adams S, Norman K, Kemp J, Jacobs Z, Costelloe M, Fairbairn A, Robins R, Stock E, Moss P, Smith T, Love S, Manne T, Lowe KM, Logan I, Manoel M, McFadden K, Burns D, Dooley T, Falkiner Z, Clarkson C.   +19 more
europepmc   +1 more source

The Quartz Conundrum : understanding the role of quartz in the composition of late Pleistocene and Holocene lithic assemblages from the Verlorenvlei area, Western Cape

, 2004
Includes bibliographical references (leaves 283-303).This research explores the related roles of quartz and bipolar reduction in the composition of Later Stone Age (LSA) lithic assemblages from the Verlorenvlei area, Western Cape Province.
Orton, Jayson
core  

Early human occupation of Australia's eastern seaboard. [PDF]

Sci Rep
Adams S, Norman K, Kemp J, Jacobs Z, Costelloe M, Fairbairn A, Robins R, Stock E, Moss P, Smith T, Love S, Manne T, Lowe KM, Logan I, Manoel M, McFadden K, Burns D, Dooley T, Falkiner Z, Clarkson C.   +19 more
europepmc   +1 more source