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However, most chert is found either as bedded chert or as nodular chert. Bedded chert is more common in Precambrian beds, but nodular chert became more...35 KB (4,221 words) - 23:05, 30 July 2024
57°20′12″N 002°50′29″W / 57.33667°N 2.84139°W / 57.33667; -2.84139 The Rhynie chert is a Lower Devonian sedimentary deposit exhibiting extraordinary fossil...31 KB (3,509 words) - 18:10, 25 August 2024
were initially described by R. Kidston and W. H. Lang from the Rhynie chert bed: R. gwynne-vaughnii in 1917, and R. major in 1920. R. gwynne-vaughanii...10 KB (1,032 words) - 21:58, 5 October 2022- sometimes used for the assemblage of plants found in the Rhynie chert Lagerstätte - rich fossil beds in Aberdeenshire, Scotland, and roughly coeval sites with...15 KB (1,509 words) - 17:43, 3 January 2024
consists of sedimentary limestone with scattered chert beds, including the heavily chertified Lost River Chert Bed in the Horse Cave Member. It is exposed at...4 KB (159 words) - 12:56, 15 March 2023- Dresser Formation (section North Pole chert)Dresser Formation consists of metamorphosed, blue, black, and white bedded chert; pillow basalt; carbonate rocks; minor felsic volcaniclastic sandstone...22 KB (2,656 words) - 01:25, 8 December 2023
Franciscan Complex (redirect from Franciscan chert)eclogites) and meta-limestones. Fossils like radiolaria are found in chert beds of the Franciscan Complex. These fossils have been used to provide age...25 KB (2,574 words) - 03:41, 1 August 2024
(1926). "On a new type of crustacean from the old Red Sandstone (Rhynie chert Bed, Aberdeenshire) – Lepidocaris rhyniensis, gen. et sp. nov". Philosophical...20 KB (1,941 words) - 13:56, 14 June 2024
Portland in Dorset, England. The quarries are cut in beds of white-grey limestone separated by chert beds. It has been used extensively as a building stone...25 KB (3,005 words) - 15:07, 27 May 2024- was created in 1917 by Kidston and Lang for fossils found in the Rhynie Chert Bed. Three genera were initially included, Rhynia, Horneophyton and Psilophyton...6 KB (648 words) - 04:47, 3 January 2024
Tillyard. 1928. Some remarks on the Devonian fossil insects from the Rhynie chert beds, Old Red Sandstone. Transactions of the Entomological Society of London...5 KB (421 words) - 12:38, 19 June 2024
"XXIV.—On Old Red Sandstone Plants showing Structure, from the Rhynie Chert Bed, Aberdeenshire. Part I. Rhynia Gwynne-Vaughanii, Kidston and Lang". Transactions...53 KB (5,701 words) - 23:36, 13 August 2024
Radiolarite (redirect from Radiolarian chert)be the unconsolidated equivalent of a radiolarite. A radiolarian chert is well-bedded, microcrystalline radiolarite that has a well-developed siliceous...19 KB (2,513 words) - 13:20, 3 May 2024
preserved specimens described from the famous Early Devonian Rhynie chert and Windyfield chert in Aberdeenshire, Scotland. Asteroxylon is considered a basal...10 KB (1,046 words) - 11:16, 5 April 2024
(1920), "On Old Red Sandstone plants showing structure, from the Rhynie Chert Bed, Aberdeenshire. Part II. Additional notes on Rhynia gwynne-vaughani, Kidston...136 KB (16,963 words) - 16:45, 9 August 2024
Mill Creek chert is a type of chert found in Southern Illinois and heavily exploited by members of the Mississippian culture (800 to 1600 CE). Artifacts...10 KB (1,111 words) - 07:56, 18 January 2024
British Columbia, the McAbee Fossil Beds west of Kamloops, about 160 km (160,000 m) NNW of the Princeton Chert beds, and the Klondike Mountain Formation...41 KB (3,584 words) - 04:45, 19 February 2024
Sedimentary rock (redirect from Sediment bed)and combined it with other elements to build their tissue. Deposits of chert formed from the accumulation of siliceous skeletons of microscopic organisms...63 KB (7,683 words) - 08:39, 25 June 2024
Olduvai Gorge (section Bed I)from chert rather than quartzite. These tools are mostly spheroids and sub-spheroids, followed by choppers.: 88, 90, 95, 98 Besides the chert quarry...30 KB (3,710 words) - 17:01, 9 August 2024
Limestone, which is a thinly bedded limestone of Mississippian origin. St. Louis Limestone includes beds of chert and shale (the chert is showcased on the tour)...8 KB (1,053 words) - 23:44, 7 January 2024
- Folkestone beds are light-coloured, rather coarse sands, enclosing layers of siliceous limestone (Folkestone stone) and chert; a phosphatic bed is found
- other relevant evidence, we should preferably ascribe the origin of bedded chert to siliceous ooze rather than hypothesizing some other origin for the