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Types of Bedrock

Andesite
Andesite

natural phosphorous levels due to andesite bedrock geology C artificially high from GEOL 101 at WVU

image: pxhere.com
Basalt
Basalt

Basalt is an extrusive igneous rock. It is the bedrock of the ocean floor and also occurs on land in extensive lava flows. It is the bedrock of the ocean floor and also occurs on land in extensive lava flows.

source: geology.com
Dacite
Dacite

Dacite ( / ˈ d eɪ s aɪ t /) is an igneous, volcanic rock.It has an aphanitic to porphyritic texture and is intermediate in composition between andesite and rhyolite.The word dacite comes from Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains (now modern Romania and Moldova) where the rock was first described.

Diorite
Diorite

Diorite forms if this type of melt crystallizes below the surface. Diorite is usually composed of sodium-rich plagioclase with lesser amounts of hornblende and biotite. It usually contains little if any quartz. This makes diorite a coarse-grained rock with a contrasting mix of black and white mineral grains. Students often use this "salt and pepper" appearance as a clue to the identification of diorite.

source: geology.com
Dolerite (Also Called Diabase)
Dolerite (Also Called Diabase)

Diabase is the preferred name in North America, yet dolerite is the preferred name in most of the rest of the world, where sometimes the name diabase is applied to altered dolerites and basalts. Many petrologists prefer the name microgabbro to avoid this confusion.

image: flickr.com
Gabbro
Gabbro

The difference between basalt and gabbro is that basalt is a fine-grained rock while gabbro is a coarse-grained rock. Olympus Mons Volcano: This shield volcano is composed of basalt and has enormous calderas at the summit.

source: geology.com
image: youtube.com
Limestone
Limestone

Limestone is a common, chemical sedimentary rock formed primarily from calcium carbonate. It is generally light-colored and can also include fossils of calcium carbonate-containing organisms, like corals. Limestone can be found all over the world and is the major type of rock found in karst features (crystal cave systems found in bedrock).

source: study.com
Marble
Marble

A: While Bedrock Kitchen and Bath does not recommend the use of marble for a kitchen countertop, we have installed many of them with spectacular results. Marble is a less dense and more porous stone than granite.

Nepheline
Nepheline

Nepheline syenite: Nepheline syenite,, medium- to coarse-grained intrusive igneous rock, a member of the alkali-syenite group (see syenite) that consists largely of feldspar and nepheline.

Peridotite
Peridotite

Peridotite is an intrusive igneous rock with an ultramafic composition.

source: geology.com
image: flickr.com
Quartzite
Quartzite

Quartzite is a nonfoliated metamorphic rock composed almost entirely of quartz. It forms when a quartz-rich sandstone is altered by the heat, pressure, and chemical activity of metamorphism.

source: geology.com
Sandstone
Sandstone

Sandstone is a sedimentary rock composed of sand-size grains of mineral, rock, or organic material. It also contains a cementing material that binds the sand grains together and may contain a matrix of silt- or clay-size particles that occupy the spaces between the sand grains.

source: geology.com
Slate
Slate

In the episode, "The Long, Long, Long Weekend", which originally aired on January 21, 1966, Slate Rock and Gravel Company is shown as still being in business after two million years and Mr. Slate is shown as being the company's founder.