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Latest Petrology Stories

2011-04-28 07:30:00

VANCOUVER, April 28 /PRNewswire-FirstCall/ - Magma Energy Corp.

2011-04-06 15:15:00

TSX-V: RES & AMEX: REE VANCOUVER, April 6 /PRNewswire/ - Rare Element Resources Ltd.

2011-01-21 08:15:00

TEMPE, Ariz., Jan. 21, 2011 /PRNewswire/ -- Big Bear Mining Corp (OTC Bulletin Board: BGBR) ("The Company") ("BGBR"), a U.S.

2011-01-07 10:52:18

Collaborating with an international research team, an economic geologist from The University of Western Ontario has discovered how gold-rich magma is produced, unveiling an all-important step in the formation of gold mines.

2010-12-07 15:35:00

VANCOUVER, Dec. 7 /PRNewswire/ - Magma Energy Corp. (TSX:MXY) advises that Magma Energy Sweden A.B.

2010-10-20 08:23:00

VANCOUVER, Oct. 20 /PRNewswire/ - Commerce Resources Corp. (TSXv: CCE) (FSE: D7H) (the "Company" or "Commerce") is pleased to report that its joint venture partner Canadian International Minerals Inc.

2010-10-07 09:00:00

VANCOUVER, Oct 7 /PRNewswire-FirstCall/ - Commerce Resources Corp.

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2010-09-27 07:30:00

A better way to pinpoint where volcanic eruptions are likely to occur has been produced by an international team of geophysicists.

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2010-09-25 06:40:00

Scientists have wondered for some time why certain seismic waves travel more quickly through the core-mantle boundary, a thin layer of the Earth's interior that lies between about 1675 and 1800 miles below the surface.

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2010-09-18 08:14:00

The Earth's mantle and its core mix at a distance of 2900 km under our feet in a mysterious zone.


Latest Petrology Reference Libraries

Chaitén
2014-08-28 10:38:21

Chaitén is a volcanic caldera that is located in southern Chile that reaches an elevation of 3,681 feet. It is thought that this volcano once held a rhyolite obsidian lava dome that reached 3,156 in height, but this was destroyed after its most recent eruption in 2008. In the past, this volcano has released grey obsidian, which was used by pre-Columbian cultures to make many objects, some of which have been found 250 miles away from the volcano. Chaitén experienced the beginning of a new...

28_e9750264d5476c85f9be09d17bc6fd51
2005-05-26 12:03:39

Biotite is a common phyllosilicate mineral that contains potassium, magnesium, iron and aluminium. It is sometimes called "iron mica" and is found in granitic rocks, gneisses, and schists. Like other mica minerals, biotite has a highly perfect basal cleavage, its flexible sheets easily flaking off. It has a hardness of 2.5 - 3, a specific gravity of 2.7 - 3.1, is colored greenish to brown or black, and can be transparent to opaque. Biotite is occasionally found in large sheets, especially in...

28_56635877b282726a86b25cf3e98722c2
2005-05-26 11:30:45

Chert is a fine-grained silica-rich cryptocrystalline sedimentary rock that may contain small fossils. It varies greatly in color from white to black, but most often manifests as gray, brown, grayish brown and light green to rusty red; its color is an expression of trace elements present in the rock, and both red and green are most often related to traces of iron (in its oxidized and reduced forms respectively). It outcrops as nodules in limestone, chalk, and dolostone formations as a...

28_42121cee4c09c0898f52263bea588d54
2005-05-26 11:26:59

Chromite, iron magnesium chromium oxide: (Fe,Mg)Cr2O4, is an oxide mineral belonging to the spinel group. Magnesium is always present in variable amounts, also aluminium and iron substitute for chromium. Chromite is found in peridotite and other layered ultramafic intrusive rocks and also found in metamorphic rocks such as serpentinites. Ore deposites of chromite form as early magmatic differentiates. It is commonly associated with olivine, magnetite, serpentine, and corundum. Chromite is...

28_b760796d3dace508242e89fc53d49081
2005-05-26 11:13:08

In geology, a conglomerate is a rock consisting of other stones that have been cemented together. Conglomerates are sedimentary rocks consisting of subangular clasts and are thus differentiated from breccias, which consist of angular clasts. Both conglomerates and breccias are characterized by clasts larger than sand (>2 mm). There are two varieties of conglomerate, defined by texture: paraconglomerates and orthoconglomerates. Paraconglomerates are one of two varieties of conglomerate...

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Word of the Day
tourtiere
  • a meat pie that is usually eaten at Christmas in Quebec
The word 'tourtiere' comes from the French tourte, or passenger pigeon.
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