Results 161 to 170 of about 12,387,687 (260)

An Experimental Study on the Transformation of Lithic Tools

open access: yesThe Journal of Korean Field Archaeology, 2012
openaire   +1 more source

Breschini and Haversat, eds.: California Lithic Studies: 1

open access: yes, 1988
California Lithic Studies: 1. Gary S. Breschini and Trudy Haversat, eds. Salinas: Coyote Press Archives of California Prehistory No. 11, 1987, iv + 96 pp., 26 figs., 8 tables, 1 map, $5.95 (paper).
openaire   +1 more source

Formation and Alteration of Magnesite Nodules From Kunwarara, Queensland, Australia, as an Analog to Mg‐Carbonate Formation on Mars

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Magnesite (MgCO3) is a magnesium (Mg) carbonate mineral that records the aqueous environmental conditions of its formation. On Earth, magnesite forms in metamorphic, diagenetic or pedogenic environments, and distinguishing between these environments is critical for understanding the fluid chemistry during magnesite precipitation. Mg carbonates
E. L. Cardarelli   +6 more
wiley   +1 more source

The Parguera Fault System: Possible Quaternary Reactivation of Bedrock Faults in Southwest Puerto Rico

open access: yesTectonics, Volume 45, Issue 9, September 2026.
Abstract We present evidence of a previously unrecognized east‐west‐trending normal fault, named the Parguera Fault, in southwest Puerto Rico. The fault is located at the northwestern edge of seismicity from the southwest Puerto Rico seismic sequence that began in 2019, near the coastal town of La Parguera.
Jessica Thompson Jobe   +12 more
wiley   +1 more source

Specialised and persistent raw material procurement by humans in the Middle Pleistocene. [PDF]

open access: yesNat Commun
Will M   +9 more
europepmc   +1 more source

Transfer of Potentially Toxic Metal(loid)s From Ultramafic Soils in a Tri‐Trophic Food Chain Experiment

open access: yesEcological Research, Volume 41, Issue 5, September 2026.
Potentially toxic metal(loid)s (PTMs) bioaccumulated across a plant‐herbivore‐predator food chain. Irrespective of soil concentrations, female crickets actively selected PTM‐enriched leaves, while predatory mantids showed no developmental impairment. Trophic transfer of PTMs was rather influenced more by a function of intrinsic species traits than by ...
João Marcelo‐Silva   +3 more
wiley   +1 more source

Evidence from Buhais Rockshelter for human settlement in Arabia between 60,000 and 16,000 years ago. [PDF]

open access: yesNat Commun
Bretzke K   +7 more
europepmc   +1 more source

Greenstone artifacts in pre-Columbian Costa Rica: from raw material to local and interregional exchanges. [PDF]

open access: yesSci Rep
Hernández-Murillo C   +6 more
europepmc   +1 more source

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