1/1
?

Granite

How to use the mindat.org media viewer

Click/touch this help panel to close it.

Welcome to the mindat.org media viewer. Here is a quick guide to some of the options available to you. Different controls are available depending on the type of media being shown (photo, video, animation, 3d image)

Controls - all media types

Zoom in and out of media using your mousewheel or with a two-finger 'resize' action on a touch device.

Use the mouse or your finger to drag the image or the view area of the image around the screen.

< and > at the left and right hand side of the screen move forwards and backwards for the other images associated with the media you selected. Usually this is for further photos of the same specimen. Keyboard shortcuts: use the left and right arrow keys.

> in the bottom center, raises the information box giving details and further options for the media, < at the top of this box then hides it. Keyboard shortcuts: use the up and down arrow keys.

? opens this help window. Keyboard shortcuts: use the H key or the ? key.

Other keyboard shortcuts:

1Fit image to screen
2Fill screen with image
5Display at full resolution
<Make background darker
>Make background lighter
spaceHide/dim titles and buttons

Controls - Video

Video files have a standard set of video controls: - Reset to start, - Skip back, - Play, - Pause, - Skip forwards. Keyboard shortcuts: You can stop/start video play with the P key.

Controls - Animation (Spin Rotation)

Animation (usually 360 degree spin rotations) have their own controls: - enable spin mode. Note that while images are loading this option will not be available but will be automatically activated when the animation has loaded. Once active you can spin the image/change the animation by moving your mouse or finger on the image left/right or by pressing the [ or ] keys.

The button switches to move mode so that you can use your mouse/fingers to move the image around the screen as with other media types.

The button, or the P key will start playing the animation directly, you can interrupt this by using the mouse or finger on the image to regain manual movement control.

Controls - 3D Stereoscopic images

Stereoscopic 3D image viewing requires a suitable 3D television or monitor correctly configured for your computer. Passive 3D systems such as LG 3DTVs are the easiest to configure for this.

To enable/disable 3D stereo display of a compatible stereo pair image press the 3 key. If the left/right images are reversed on your display (this often happens in full-screen mode) press the 4 key to reverse them.

Summary of all keyboard shortcuts

1Fit image to screen
2Fill screen with image
3Switch to 3D display of stereo pair
4Switch left/right images in 3D mode
5Display at full resolution
<, >Make background darker/lighter
H or ?Show/hide this help page
PPlay/Pause Video or Animation
[, ]Backwards/forwards one frame (Animation only)
up arrowShow information box
down arrowHide information box
left arrowPrevious image/media page
right arrowNext image/media page
spaceHide/dim titles and buttons


Copyright © Jamison K. Brizendine
 
 
minID: U9U-3W7

Granite

Copyright © Jamison K. Brizendine  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 7.5 cm x 4.2 cm x 4.5 cm

This is a small cabinet reference specimen of Precambrian Graniteville Granite from the “Missouri 36/Missouri 96” outcrop, Graniteville, Missouri, United States. This material is often called “Missouri Red” Granite and is the state rock of Missouri. The outcrop is considered a “pavement” outcrop, due to it being rounded by spheroidal weathering and by freeze/thaw cycles (Berri 2009).

The red granite from Missouri has been used in several building and construction projects, including monuments, tombstones, paving blocks, riprap, foundations and railroad ballast (the quarried granite ballast is often mixed with the rhyolite ballast that is quarried at nearby Iron Mountain Trap Rock Co.). Granite from this locality is considered to be of great economic importance to the state of Missouri.

Hansink (1965) describes the Graniteville Granite as being medium to course-grained, red to pink and composed mostly of potassium feldspars and quartz with minor amounts of biotite, albite and pyrite. Graniteville granite has also produced pegmatite pods (but have only been observed at the active Sheahan Quarry), which have produced unusual fluorite crystals, often associated with chlorite (Tolman and Goldich 1935). Other pegmatitic minerals include titanite and excellent crystals of smoky quartz. Pegmatite specimens from this locality are extremely rare and one example is in the Kevin Conroy collection (2014). Bickford and Sides (1975) dated the Graniteville pluton to be approximately 1.2 billion years old, making this specimen to be one of the geologically oldest, if not the oldest “rock” in my collection.

I collected this specimen April 8, 2006 on an Earlham College petrology field trip. I mostly collected reference specimens for a field trip write up. This was one of those specimens.

The specimen is approximately 7.5 x 4.2 x 4.5 cm

Jamison K. Brizendine specimen and photo

Reference Cited:

Berri, R., 2009, Igneous geology of southeast Missouri: Volcanic features, granite emplacement, intrusions and mineralization: Association of Missouri Geologists Field Trip Guidebook, Berri Exploration Services, p. 1-43.

Bickford, M., and J. Sides, 1983, Geologic map of exposed rocks in the Wachita Mountain (Fredericktown NW ¼) Quadrangle, Missouri: Missouri Department of Natural Resources, Geological Survey Open File Map OFM-83-161 MR.

Conroy, K., Fluorite, 2014, quartz (var: smoky quartz), chlorite group: Mindat.org, MinID: XHT-FQR, http://www.mindat.org/photo-602173.html .

Hansink, J., 1965, Geology of the Graniteville Granite: St. Louis University, unpublished master of science thesis, 84 p.

Tolman, C., and S. Goldich, 1935, The granite, pegmatite and replacement veins in the Sheahan Quarry, Graniteville, Missouri: American Mineralogist, 20 (4), p. 229-239.

Collected: 2006

This photo has been shown 414 times
Photo added:2nd Apr 2015
Dimensions:1271x949px (1.21 megapixels)
Date/Time of Photo:5th Jan 2007 12:28:37
Camera:KODAK Z1275 ZOOM
Exposure time:1/60s
Aperture:f/2.8
Focal Length:8mm
Focal Length (35mm film equivalent):36mm
ISO speed:64
View Jamison K. Brizendine's Photos View Granite Gallery

Discuss this Photo

click this
 
矿物 and/or 产地  
版权所有© mindat.org1993年至2020年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 Current server date and time: 2020.3.28 09:40:05