File:Calcite-lined vug (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 1 (26952928100).jpg
Original file (4,000 × 3,000 pixels, file size: 4.34 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionCalcite-lined vug (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 1 (26952928100).jpg |
Calcite-lined vug in the Mississippian of Ohio, USA. A mineral is a naturally-occurring, solid, inorganic, crystalline substance having a fairly definite chemical composition and having fairly definite physical properties. At its simplest, a mineral is a naturally-occurring solid chemical. Currently, there are over 5400 named and described minerals - about 200 of them are common and about 20 of them are very common. Mineral classification is based on anion chemistry. Major categories of minerals are: elements, sulfides, oxides, halides, carbonates, sulfates, phosphates, and silicates. The carbonate minerals all contain one or more carbonate (CO3-2) anions. Calcite is a common mineral. It is calcium carbonate (CaCO3). It has a nonmetallic luster, commonly clearish to whitish to yellowish to grayish in color, is moderately soft (H≡3), moderately light-weight, has hexagonal crystals, and rhombohedral cleavage (three cleavage planes at 75º & 105º angles - cleavage pieces look like lopsided boxes). The easiest way to identify calcite is to drop acid on it - it easily bubbles (effervesces) in acid. The bubbles are carbon dioxide gas. If the acid is dilute hydrochloric acid, the chemical reaction is: 2HCl(aq) + CaCO3(s) -->> CO2(g)↑ + H2O(l) + CaCl2(aq) The most important & voluminous calcitic rocks in the world are limestone (sedimentary), marble (metamorphic), carbonatite (igneous), and travertine (speleothem, or "cave formations", and many hotspring deposits). Quite a few hydrothermal veins in the world are calcitic or have calcite as a principal component. The sample shown above is an irregularly shaped cavity lined with oddly-shaped calcite crystals (click on the above photo to zoom in). It is hosted in the siliciclastics-dominated Vinton Member of the Logan Formation. The Vinton is mostly siltstone, but sandstone and shale also occur. Some carbonate horizons and concretions are also present, which are the likely ultimate source for the calcium carbonate making up the crystals in this vug. Host rock: Vinton Member, upper Logan Formation, Osagean Stage, upper Lower Mississippian Locality: Mohawk Dam emergency spillway, northwest of the town of Nellie, western Coshocton County, eastern Ohio, USA (vicinity of 40º 21' 26.42" North latitude, 82º 04' 57.97" West longitude) Photo gallery of calcite: <a href="http://www.mindat.org/gallery.php?min=859" rel="nofollow">www.mindat.org/gallery.php?min=859</a> |
Date | |
Source | Calcite-lined vug (Vinton Member, Logan Formation, Lower Mississippian; Mohawk Dam spillway, western Coshocton County, Ohio, USA) 1 |
Author | James St. John |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/26952928100 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
10 October 2019
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 02:13, 10 October 2019 | 4,000 × 3,000 (4.34 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon PowerShot D10 |
Exposure time | 1/400 sec (0.0025) |
F-number | f/3.2 |
ISO speed rating | 80 |
Date and time of data generation | 11:54, 7 May 2016 |
Lens focal length | 7.23 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 18:23, 24 May 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 11:54, 7 May 2016 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 8.65625 |
APEX aperture | 3.34375 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 12:23, 24 May 2016 |
Unique ID of original document | F5B38378D2175A0E92AF20718FA8031C |