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The fossiliferous concretions are found in the Mazon River area of Grundy, Will, Kankakee, and Livingston counties. Additional fossils are found in LaSalle County, Illinois; between the Vermilion River and Marseilles, Illinois. The ironstone concretions are recovered from exposures along streams, roadcuts and in active or abandoned coal mine areas.
The second feature contained seven concretions. Five of these were elongated, and one was prismatic. These were found in maroon mud, but were grey bodied. Indicating they originated in a different sedimentary environment. All pieces found originated as congealed viscous body fat, but was replaced by minerals from ground water. [2]
Concretions in Torysh, Western Kazakhstan Concretions with lens shape from island in Vltava river, Prague, Czech Republic Marlstone aggregate concretion, Sault Ste. Marie, Michigan, United States A concretion is a hard and compact mass formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary ...
They were found at the Dewars Farm Quarry in Oxfordshire, England. ... Researchers have uncovered a "dinosaur highway" after hundreds of giant prehistoric footprints dating back 166 million years ...
A nearly complete and intact dinosaur skeleton has been excavated in France. The specimen is a Titanosaur, one of the largest dinosaurs of its time.
The London Hammer (also known as the "London Artifact") is a hammer made of iron and wood that was found in London, Texas in 1936. Part of the hammer is embedded in a limey rock concretion, leading to it being regarded by some as an anomalous artifact.
NASA's Mars Reconnaissance Orbiter, which has been studying Martian terrain since it was launched 12 years ago, recently discovered a feature on the Red Planet's surface that has left researchers ...
They range in diameter from 3 to 6 meters (9.8 to 19.7 ft) with the average diameter being 3.6 meters (12 feet). These concretions lie 2 to 8 meters (6.6 to 26.2 ft) apart. [8] Similar giant calcite-cemented concretions have also been found in a quartzite quarry within Lincoln County and in exposures of the similar age sandstones in Utah and ...