Silcrete is an indurated (resists crumbling or powdering) soil duricrust formed when surface soil, sand, and gravel are cemented by dissolved silica. The formation of silcrete is similar to that of calcrete, formed by calcium carbonate, and ferricrete, formed by iron oxide.

The microlith was made on a blade-like flake struck from a silcrete core, and was shaped mostly by double-backing. Elongated, asymmetrical microliths like this—with the widest part near one end, opposite a pointed tip—are sometimes called Bondi Points by Australian archaeologists, after stone artefacts of this type discovered at Bondi Beach ...

Oct 1, 2017 · Silcretes occur widely in paleolandscapes in several continents. What are they and how did they form? What made silcretes suitable for prehistoric people to form stone tools? Silcretes are clearly observed and abundant as components …

Silcrete is a strongly indurated rock primarily made up of inherited quartz grains and a siliceous cement. It is typically found in arid and semi-arid regions and can be formed under various environmental conditions, reflecting successive dissolution, precipitation, and …

Jan 1, 2013 · Silcretes or siliceous duricrusts are defined by Summerfield (1983) as the indurate products of surficial and penesurficial (near-surface) silica accumulation. They are formed by cementation and/or low-temperature replacement of bedrocks, weathering deposits, unconsolidated sediments, soil or other materials.

Aug 1, 2017 · Despite performing well in the gelatin blocks by penetrating more deeply and generating a larger wound track, our results suggest HP sized heat-treated silcrete backed pieces hafted transversely performed relatively poorly at penetrating an animal carcass.

The core technology is based on short ‘chaînes opératoires’ on local quartz aimed at producing pointed end‐products on pebbles and flakes. The methods and techniques include both the bipolar technique on an anvil and direct percussion with a hard hammer.

Defining and understanding change as observed in the mid-to-late Holocene Australian archaeological record is the primary focus of this research.

Defining and understanding change as observed in the mid-to-late Holocene Australian archaeological record is the primary focus of this research.

Aug 21, 2017 · This paper reviews the literature of research on predominantly Australian silcretes as well as reviewing their occurrence, mineralogy, geochemistry and petrology. Silcrete ages and paleoclimatic significance are also reviewed.