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USGS Geologic Map of North America (High resolution, click to zoom) Relief map showing the varying age of bedrock underlying North America. (Click to zoom) See legend below This is the legend for the North American geological map above. Geologic map of North America
Cryoturbation is the dominant force operating in the active layer, and tends to make it generally uniform in composition throughout. However, variation in the composition of soils due to differences in parent rock are very marked in permafrost regions due to the low rate of weathering in the very cold climate.
The Floridian peninsula is a porous plateau of karst limestone sitting atop bedrock known as the Florida Platform. The emergent portion of the platform was created during the Eocene to Oligocene as the Gulf Trough filled with silts, clays, and sands. Flora and fauna began appearing during the Miocene. No land animals were present in Florida ...
The Isua Greenstone Belt in the Isukasia area, southwest Greenland, is extraordinary in that it contains some of the oldest bedrock on the planet, approximately 3800 million years old. The bedrock is not nearly as metamorphosed as the surrounding gneiss bedrock and is therefore of interest for answering how the Earth's surface appeared billions ...
Topo map(s) Mount Kenya by Wielochowski and Savage [2] [3]: Geology; Mountain type: Stratovolcano (extinct): Last eruption: 2.6–3.1 MYA: Climbing; First ascent: 13 September 1899 by Mackinder, Ollier, and Brocherel, although the peoples of Kenya believed God resided on this mountain and regularly ascended the peaks to perform spiritual rites.
Global distribution of major outcrops of carbonate rocks (mainly limestone, except evaporites). The English word karst was borrowed from German Karst in the late 19th century, [6] which entered German usage much earlier, [7] to describe a number of geological, geomorphological, and hydrological features found within the range of the Dinaric Alps, stretching from the northeastern corner of ...
The Yorktown Formation is a mapped bedrock unit in the Coastal Plain of Maryland, Virginia, North Carolina and South Carolina. It is overconsolidated and highly fossiliferous . Description
locate is a Unix utility which serves to find files on filesystems. It searches through a prebuilt database of files generated by the updatedb command or by a daemon and compressed using incremental encoding. It operates significantly faster than find, but requires regular updating of the database.