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Chert Gravel and Neogene Drainage in East-central Kansas
Chert Gravel Neogene Drainage East-central Kansas
2009/10/21
Eastern Kansas has an active geomorphic regime dominated by stream erosion, which is strongly influenced by bedrock structure. Alluvial deposits of chert gravel of presumed Neogene age are widespread ...
HRTEM of microcrystalline opal in chert and porcelanite from the Monterey Formation, California
HRTEM microcrystalline opal chert porcelanite Monterey Formation California
2012/4/9
Microcrystalline opal wasinvestigated using low-dose transmission electron microscopy (TEM) methods to identify microstructural characteristics and possible phase-transforma-tion mechanisms that accom...