Download - Sedimentary Rock Pics With Info
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Conglomerate
Detrital
Clastic texture
Pebbles and granules cemented together
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Oolitic Chert
Oolitic texture
Ooids are chemically precipitated balls of CaCO3 (calcite)
This rock was originally an oolitic limestone, but the calcite has been replaced by silica.
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Coquina (a type of limestone)
Biochemical
Shell fragments cemented together.
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Chalk (a type of limestone)
Biochemical
Loosely-cemented microscopic hard parts of plankton
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Tufa (a type of limestone)
Chemically precipitated
This rock is often precipitated out around freshwater springs that are
saturated with dissolved calcite.
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Arkose Sandstone
Clastic texture
This is a feldspar-rich sandstone. Since feldspars generally alter into clays in the
presence of water, this rock implies deposition in an arid environment.
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Shale
Clastic texture
This is the most abundant of all sedimentary rocks. Shale in a “fissile”
mudstone.
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Quartz Sandstone
Clastic texture
Iron oxide cement gives this sandstone its rusty red coloration. The quartz grains
are so heavily coated with iron oxide it is difficult to see the quartz.
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Chert (also called flint)
Chemically or biochemically-precipitated
Chert is microcrystalline silica (quartz). It is very hard and smooth often breaking withconchoidal fracture. This rock was used to make arrowheads and knives by NativeAmericans and others.
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Graywacke Sandstone
Clastic texture
This rock is a mixture of sand and mud.
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Micrite (a type of limestone)
Chemically or biochemically-precipitated
This rock is comprised of microcrystalline calcite.
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Travertine (a variety of limestone)
Chemically-precipitated
This is a “banded” limestone often seen in the form of cave formations
such as dripstones and flowstones.
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Rock Gypsum
Chemically-precipitated
This is a variety of gypsum called alabaster. This rock is often associated
with evaporating bodies of water.
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Rock Gypsum
Chemically-precipitated
This is a variety of gypsum called alabaster. This rock is often associated
with evaporating bodies of water.
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Bituminous Coal
This rock is derived from plant debris that collects in an anoxic environment such as a
swamp. This material originally forms peat, but upon further burial peat is transformed into
lignite coal, lignite into subituminous coal, subituminous into bituminous coal, and in the
realm of metamorphism bituminous is transformed into anthracite coal.
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Claystone
Clastic texture
This clay-rich rock has some “gritty’ sand particles, but is predominantly
clay. Wet the rock and feel how it turns gooey.
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Quartz Sandstone
Clastic texture
This rock is a well-cemented fine-grained sandstone.
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Dolomite
Crystalline texture
This rock is similar to limestone, but rather than being comprised of the mineral calcite
(CaCO3), dolostone is comprised of the mineral dolomite (Ca Mg (CO3)2. This rock will
react with 10% HCl if you crush it to a powder.
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Rock Salt
Chemically-precipitated
This is the mineral halite. It is most often associated with the
evaporation of a body of water.
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Breccia
Clastic texture
This rock has a lot of angular gravel (granules and pebbles). The angular nature of the
particles suggests these pieces of gravel never traveled far from the rock they broke off of.
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Micrite (a variety of limestone)
Chemcially or biochemically-precipitated
The dark color of this rock is unusual for a limestone. It is most likely the
result of organic matter mixed in with the microcrystalline calcite.
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Chert (also know as flint)
Chemically or biochemically-precipitated
Chert is microcrystalline silica (quartz). It is very hard and smooth often breaking with
conchoidal fracture. This rock was used to make arrowheads and knives by Native
Americans and others.
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If you have a cell phone or PDA that you can view and load
pictures on, you can put this presentation on it. If you spend a
lot of time on the run, you can view it anywhere.
Go to the file menu>
Click on [Save as…]>
Under the box that says [file name] there is a box that says
[Save as type]
Click this box to drop down a menu>
The menu asks what format you want to save in
You want to pick: [JPEG File Interchange Format]
Click the box to save>
A menu pops up asking “Do you want to export every slide in
this presentation or only the current slide”.
Click [Every Slide]>
This creates a folder on your computer with all the slides
turned into picture files that you can put on any device that
supports picture viewing.