|
Chalk Bluffs
The Chalk Bluffs is a barren chalk escarpment in the northeastern part of the U.S. state of Colorado, stretching from the Wyoming border east of Interstate 25, I-25 to near the South Platte River in Logan County, Colorado, Logan County and Weld County, Colorado, Weld County. Geology The Chalk Bluffs exposes the Ogallala Formation, Ogallala, Fox Hills Sandstone, Fox Hills and Arikaree Formation, Arikaree geological formation, Formations. Miocene, Eocene and Paleocene vertebrate fossils are found. Ecology Most of the escarpment lies within the Pawnee National Grasslands. As the bluffs are primarily barren and protected from fire. However trees normally found in the foothills of the Rocky Mountains are found there, including: Ponderosa pine, Rocky Mountain juniper, limber pine, and mountain mahogany. Numerous Bird of prey, raptors nest on the cliffs including Swainson's hawks, ferruginous hawks, golden eagles, and prairie falcons. The bluffs are a favorite site for birdwatching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalk Bluffs 2016-07-12 384
Chalk is a soft, white, permeability (Earth sciences), porous, sedimentary rock, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor. Chalk is common throughout Western Europe, where deposits underlie parts of France, and steep cliffs are often seen where they meet the sea in places such as the Dover cliffs on the Kent coast of the English Channel. Chalk is mined for use in industry, such as for quicklime, bricks and builder's putty, and in agriculture, for raising pH in soils with high acidity. It is also used for "Blackboard, blackboard chalk" for writing and drawing on various types of surfaces, although these can also be manufactured from other carbonate-based minerals, or gypsum. Description Chalk is a fine-textured, earthy type of limestone distinguished by its light color, softness, and high porosity. It is composed mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
%2C_Western_Negev%2C_Israel.jpg "Click for more on -> Chalk Bluffs 2016-07-12 384")