Latest Chert Stories
FORT WORTH, Texas, Aug. 27, 2012 /PRNewswire/ -- A 6.125" U613M PDC bit combined with a TorkBuster performance drilling tool drilled the Mississippi lateral significantly further and faster than any offset drilled in Woods County, Oklahoma. Drilling 3,370' of high-chert, Mississippi formation at 71.7 ft. /hr., the run saved the operator $207,000 compared to the average offset "chat" well. (Logo: http://photos.prnewswire.com/prnh/20110906/DA62410LOGO) The "chat" is the upper zone...
CHARLESTOWN, Ind. -- Workers building a boat ramp at southeastern Indiana's Charlestown State Park have uncovered the apparent remains of a 4,000-year-old "kitchen" ancient American Indians tribes may have used to prepare their winter food supply. The discovery of the site in eastern Clark County prompted the state to temporarily halt work on the Ohio River boat ramp project. Bob McCullough, who heads an archaeological survey team from Indiana University-Purdue University Fort...
Latest Chert Reference Libraries
The Flint Hills, known historically as Bluestern Pastures or Blue Stem Hills, are a group of hills located in eastern Kansas reaching into north central Oklahoma, extending from Marshall County and Washington County in Kansas in the north to Cowley County, Kansas and Osage and Kay counties in Oklahoma towards the south. The people of Oklahoma usually refer to the same geologic formation as the Osage Hills or “The Osage”. The Flint Hills are designated as a unique ecoregion due to it...
Chert is a fine-grained silica-rich cryptocrystalline sedimentary rock that may contain small fossils. It varies greatly in color from white to black, but most often manifests as gray, brown, grayish brown and light green to rusty red; its color is an expression of trace elements present in the rock, and both red and green are most often related to traces of iron (in its oxidized and reduced forms respectively). It outcrops as nodules in limestone, chalk, and dolostone formations as a...
Limestone is a sedimentary rock composed of the mineral calcite (calcium carbonate). The primary source of this calcite is usually marine organisms. These organisms secrete shells that settle out of the water column and are deposited on ocean floors as pelagic ooze (see lysocline for information on calcite dissolution). Secondary calcite may also be deposited by supersaturated meteoric waters (groundwater that precipitates the material in caves). This produces speleothems such as stalagmites...
