File:Conglomerate 1.jpg
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Summary
[edit]DescriptionConglomerate 1.jpg |
English: Conglomerate (quartz-pebble conglomerate)
Sedimentary rocks form by the solidification of loose sediments. Loose sediments become hard rocks by the processes of deposition, burial, compaction, dewatering, and cementation. There are three categories of sedimentary rocks: 1) Siliciclastic sedimentary rocks form by the solidification of sediments produced by weathering & erosion of any previously existing rocks. 2) Biogenic sedimentary rocks form by the solidification of sediments that were once-living organisms (plants, animals, micro-organisms). 3) Chemical sedimentary rocks form by the solidification of sediments formed by inorganic chemical reactions. Most sedimentary rocks have a clastic texture, but some are crystalline. Conglomerate is a siliciclastic sedimentary rock consisting of a mix of large & small grains - it is poorly sorted. The larger grains (pebbles or cobbles or boulders) in conglomerates are rounded to subrounded in shape. The finer-grained matrix is usually sand or mud. Most conglomerates were deposited in stream/river environments or alluvial fan environments or some very shallow marine environments. Seen here is a quartzose conglomerate, having rounded quartz pebbles and quartz sand. Some conglomerates are feldspathic - they have an abundance of K-feldpar pebbles. Some conglomerates are lithic - they have an abundance of large clasts composed of a variety of other rock types. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/16603625659/ |
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@N05/16603625659. 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. |
26 March 2024
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current | 20:02, 26 March 2024 | ![]() | 1,165 × 994 (1.57 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/16603625659/ with UploadWizard |
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Width | 1,213 px |
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Height | 1,056 px |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 550 dpi |
Vertical resolution | 550 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 21:32, 11 March 2015 |
Exif version | 2.21 |
Color space | sRGB |
Unique ID of original document | 64793C6ED39A120583B7371512BC84FC |
Date and time of digitizing | 17:30, 11 March 2015 |
Date metadata was last modified | 17:32, 11 March 2015 |