exploitation in the limestone stretch of the Egyptian Nile Valley, The African Archaeological Review 8: 77-102.
Hammerstones were of basalt (huwbiyp), the only local stone strong enough to knap chert
Most hoes were made from Mill Creek chert
that outcrops in south-western Illinois (Winters 1981; Milner 1984; Brown et al.
0x20 The highest grade samples were collected 100 m from the intrusive contact in brecciated and silicified siltstone and chert
with quartz veining and disseminated arsenopyrite with seven samples containing greater than 4.
At the Chert
Cliff deposit mineralization is hosted in Webb Formation siltstones in contact with lower massive Devonian limestone.
from the Arbuckle Group, Slick Hills, SW Oklahoma: a combined field, petrographic, and isotopic study.
IMPLICATIONS OF CARBON AND OXYGEN ISOTOPIC RATIOS IN PALEOZOIC CHERT
AND HOST CARBONATE ROCKS IN THE VICINITY OF CHATTANOOGA, TENNESSEE.
For example, too early freedom from parental control has been associated with undesired adolescent behaviors, such as dropping out of school (Dornbush, Ritter, Mont-Reynaud, & Chert
, 1990; Stessa & Steinberg, 1991).
Bureau of Transportation, supported his research on the deleterious effects of chert
in concrete mixtures used in Ohio's highways.
That we were able to succeed in such a bleak economy, with the construction and remodeling industries severely depressed and at a time when other window manufacturers are shutting down plants or going out of business, is truly remarkable," said Steve Chert
, Executive Vice President.
The evidence comes from tiny crystals of the iron-oxide mineral haematite in a 160-metre-long core section that forms part of the Marble Bar Chert
Ond y llun i mi yw Harri Bach Bodedern, gyda'i goes bren a'i ffon fagl, yntau gydag asyn a chert
yn y stryd.