搜索结果: 1-2 共查到“理学 Chert”相关记录2条 . 查询时间(0.063 秒)
Chert Gravel and Neogene Drainage in East-central Kansas
Chert Gravel Neogene Drainage East-central Kansas
font style='font-size:12px;'>
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
font style='font-size:12px;'>
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...