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USGS 1:24K Quadrangle
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Featured collections Specimens Education Collection Rocks Sedimentary rocks Chert & Diatomite
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Chert & Diatomite

Photographs of siliceous, chemical and biochemical sedimentary rocks in the IGWS education collection

TIF
ED0720 Jaspilite
ED0720 Jaspilite  
TIF
ED0699 Diatomite
ED0699 Diatomite  
TIF
ED2529 Diatomite
ED2529 Diatomite  
TIF
ED0931 Chert
ED0931 Chert  
TIF
ED0694 Chert
ED0694 Chert  
TIF
ED2531 Chert projectile points
ED2531 Chert projectile points  
TIF
ED1126 Diatomite
ED1126 Diatomite  
TIF
ED1402 Chert
ED1402 Chert  
TIF
ED1559 Banded iron formation
ED1559 Banded iron formation  
TIF
ED1546 Banded iron formation
ED1546 Banded iron formation  
TIF
ED2100 Chert
ED2100 Chert  
TIF
ED1908 Chert
ED1908 Chert  
TIF
ED2425 Chert nodules
ED2425 Chert nodules  
TIF
ED2534 Banded iron formation
ED2534 Banded iron formation  
TIF
ED2175 Diatomite
ED2175 Diatomite  
TIF
ED1906 Chert
ED1906 Chert