File:Ferruginous quartz-pebble conglomerate (near Olive Hill, Kentucky, USA) 1.jpg
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| Description |
English: Conglomerate is a coarse-grained, poorly-sorted, siliciclastic sedimentary rock. The large grains can be pebbles, cobbles, or boulders. Conglomerate's large grains are rounded to subrounded. Breccia is a similar sedimentary rock, but with angular large grains. If a mix of rounded and angular grains are present, the rock is still called "conglomerate".
This sample comes from the siliciclastics overburden at an old carbonate quarry near the town of Olive Hill, Kentucky. Most quarries in this area targeted limestones and magnesian limestones of the Mississippian-aged Slade Formation (also known as the Newman Limestone). Overlying siliciclastic units are the Carter Cave Sandstone (Mississippian), Grundy Formation (Pennsylvanian), Pikeville Formation (Pennsylvanian), and the Hyden Formation (Pennsylvanian). The conglomerate seen here is mostly dark reddish-brown from iron oxide (hematite). Most of the pebbles are composed of quartz. An angular, earthy hematite clast is also present. Stratigraphy: undetermined Mississippian- or Pennsylvanian-aged unit (an old label accompanying the rock says "Mississippian") Locality: Highland Stone Company quarry, near the town of Olive Hill (this probably refers to an old quarry east of Olive Hill, adjacent to a former railroad - apparently quarry number 5 of Richardson, 1923, p. 67), northeastern Kentucky, USA Some info. from: Richardson (1923) - The building stones of Kentucky, a detailed report covering the examination, analysis and industrial evaluation of the principal building stone deposits of the state. The Kentucky Geological Survey, Series Six 11. 355 pp. |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/53528822613/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/53528822613. It was reviewed on 26 March 2024 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 20:03, 26 March 2024 | | 3,200 × 2,373 (5.59 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53528822613/ with UploadWizard |
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