Chert (/ˈtʃɜːrt/) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide... 35 KB (4,233 words) - 12:39, 15 April 2024 |
New Harmony Group (redirect from Grassy Knob Chert) is made up of three formations, the Grassy Knob Chert, the Backbone Limestone and Clear Creek Chert. It is Lower Devonian in age. Eastward the group... 3 KB (282 words) - 18:01, 7 March 2024 |
Pilbara Craton (redirect from Apex chert) microorganisms permineralized in 3.465-billion-year-old Australian Apex chert rocks. However, the evidence for the biogenicity of these microstructures... 25 KB (2,079 words) - 18:06, 8 November 2023 |
Dresser Formation (section North Pole chert) white chert. Facies 3, which overlies facies 2, consists largely of centimeter-layered chert. The layered chert consists of white-gray layered chert and... 22 KB (2,656 words) - 01:25, 8 December 2023 |
The Huntersville Chert or Huntersville Formation is a Devonian geologic formation in the Appalachian region of the United States. It is primarily composed... 5 KB (454 words) - 17:11, 27 March 2024 |
and William H. Lang in 1917. The species is known only from the Rhynie chert in Aberdeenshire, Scotland, where it grew in the vicinity of a silica-rich... 10 KB (1,032 words) - 21:58, 5 October 2022 |
The Bigfork Chert is a Middle to Late Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. First described in 1892, this... 3 KB (262 words) - 03:29, 15 February 2021 |
Hunton Megagroup (redirect from Penters Chert) Clifty Limestone is very sandy, light blue to bluish grey. The Penters Chert is a Devonian geologic formation in the Ozark Plateaus of Arkansas. Its... 14 KB (1,194 words) - 18:45, 25 April 2024 |
Radiolarite (redirect from Radiolarian chert) Radiolarite is a siliceous, comparatively hard, fine-grained, chert-like, and homogeneous sedimentary rock that is composed predominantly of the microscopic... 19 KB (2,513 words) - 00:43, 14 April 2024 |
partial head with preserved mouthparts from the Early Devonian aged Rhynie chert around 400 million years ago, when Earth’s first terrestrial ecosystems... 4 KB (421 words) - 09:41, 22 March 2024 |
Franciscan Complex (redirect from Franciscan chert) experienced low-grade metamorphism. Other important lithologies include chert, basalt, limestone, serpentinite, and high-pressure, low-temperature metabasites... 25 KB (2,573 words) - 18:11, 16 September 2023 |
03694°W / 40.09750; -112.03694 Discovery 1960 (by Dale Green) Geology Chert Entrances 1 Difficulty Slippery Hazards Slippery and Tight Access Closed... 12 KB (1,116 words) - 22:42, 16 April 2024 |
Devonian fossil assemblage from the Rhynie chert. These early plants were preserved by being petrified in chert formed in silica-rich volcanic hot springs... 94 KB (8,002 words) - 22:45, 7 April 2024 |
Manuport (section Barrow Island chert) In 2014, a chert manuport was discovered embedded in an ancient reef on Barrow Island, Western Australia. The island has no natural chert deposits and... 13 KB (1,548 words) - 23:28, 13 April 2024 |
Flint (category Chert) cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely... 23 KB (2,617 words) - 18:35, 23 April 2024 |
Monterey Formation (redirect from Monterey chert) from diatom-rich plankton, became diatomites, porcelainites, and banded cherts. The Monterey formation has long been recognized as the primary source of... 19 KB (2,033 words) - 01:30, 26 January 2024 |
Early Eocene Princeton Chert in British Columbia, Canada. Allenbya collinsonae is known exclusively from the Princeton Chert, a fossil locality in British... 16 KB (1,911 words) - 18:55, 28 March 2024 |
Ramah, Newfoundland and Labrador (section Ramah Chert) semi-translucent light-grey stone with dark banding called "Ramah chert". The Ramah chert outcrops in a narrow geological bed stretching from Saglek Fiord... 2 KB (306 words) - 14:35, 11 April 2024 |
Wellman, C. H. (2011). "A high-precision U–Pb age constraint on the Rhynie Chert Konservat-Lagerstätte: time scale and other implications". Journal of the... 5 KB (395 words) - 07:48, 21 April 2024 |
Nuvvuagittuq Greenstone Belt (section Chert) The Nuvvuagittuq Greenstone Belt (NGB; Inuktitut: [nuv.vu.a.git.tuq]) is a sequence of metamorphosed mafic to ultramafic volcanic and associated sedimentary... 14 KB (1,610 words) - 19:47, 25 February 2024 |
species is known from permineralized remains recovered from the Princeton Chert in British Columbia, Canada. Rhizomes of Dickwhitea are noted for having... 14 KB (1,693 words) - 05:06, 28 March 2024 |
Xert (redirect from Xert/Chert) del Consell, pel qual s’aprova el canvi de denominació del municipi de Chert/Xert per la forma exclusiva en valencià de Xert. [2014/6338] DOCV. Generalitat... 5 KB (239 words) - 04:58, 13 December 2023 |