File:Calcite (Auglaize Quarry, near Junction, Ohio, USA) (27201298108).jpg
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[edit]DescriptionCalcite (Auglaize Quarry, near Junction, Ohio, USA) (27201298108).jpg |
Calcite from Ohio, USA. (public display, Geology Department, Wittenberg University, Springfield, 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. Geologic context: calcite crystals that partially filled a vug in carbonate rock of the Detroit River Group or Dundee Limestone (Lower to Middle Devonian) Locality: Stoneco Incorporated's Auglaize Quarry, southwest of the town of Junction, northeastern Paulding County, northwestern Ohio, USA 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 (Auglaize Quarry, near Junction, Ohio, USA) |
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@N05/27201298108 (archive). It was reviewed on 18 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
18 October 2019
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current | 02:50, 18 October 2019 | ![]() | 2,087 × 2,640 (3.48 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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ISO speed rating | 80 |
Date and time of data generation | 12:18, 24 March 2018 |
Lens focal length | 18.6 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
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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 | 10:32, 28 March 2018 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 12:18, 24 March 2018 |
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APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
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File source | Digital still camera |
Custom image processing | Normal process |
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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 | 06:32, 28 March 2018 |
Unique ID of original document | 756F2B83387852042C506F569873F157 |
IIM version | 1 |