File:Rock anhydrite (Lockport Dolomite, Middle Silurian; Penfield Quarry, Monroe County, western New York State, USA) 1.jpg
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Summary
[edit]DescriptionRock anhydrite (Lockport Dolomite, Middle Silurian; Penfield Quarry, Monroe County, western New York State, USA) 1.jpg |
English: Rock anhydrite from the Silurian of New York State, USA. (7.4 cm across at its widest)
Rock anhydrite is an uncommon, crystalline-textured, ~monomineralic, chemical sedimentary rock. It is composed of the mineral anhydrite (CaSO4 - calcium sulfate), which is gypsum without the water (gypsum is hydrous calcium sulfate - CaSO4·2H2O). Rock anhydrite forms the same way as the more common rock salt and rock gypsum (gyprock) - they are all evaporites, formed by the evaporation of water (usually seawater) and the precipitation of dissolved minerals. Rock anhydrite is prone to conversion to rock gypsum, and vice versa. Rock anhdyrite to rock gypsum transformations occur commonly in nature - the accompanying volume changes often result in significant deformation of surrounding rocks. Stratigraphy: Lockport Dolomite, upper Niagaran Series, upper Middle Silurian Locality: Penfield Quarry, town of Penfield, east of Rochester, Monroe County, western New York State, USA (43° 08' 51.61" North, 77° 28' 51.01" West) |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/15442589180/ |
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@N05/15442589180. It was reviewed on 13 October 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
13 October 2020
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current | 02:10, 13 October 2020 | 2,824 × 2,048 (3.58 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/15442589180/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/100 sec (0.01) |
F-number | f/4 |
ISO speed rating | 250 |
Date and time of data generation | 23:44, 2 July 2012 |
Lens focal length | 11.6 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 20:15, 25 October 2014 |
Y and C positioning | Centered |
Exif version | 2.21 |
Date and time of digitizing | 23:44, 2 July 2012 |
Meaning of each component |
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APEX shutter speed | 6.6582115219261 |
APEX aperture | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905405405 |
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 | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Image compression mode | 3 |
Supported Flashpix version | 1 |
Image width | 2,824 px |
Image height | 2,048 px |
Date metadata was last modified | 16:15, 25 October 2014 |
IIM version | 2 |