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Latest Metamorphic rocks Stories

Red Mountain mine
2013-12-07 05:50:16

April Flowers for redOrbit.com - Your Universe Online Can an abandoned mine help with the fight against global warming? Researchers from Stanford University think so. They have been using an abandoned mine to gain new insights on how to permanently entomb greenhouse gas emissions inside the Earth. The team has spent two years trying to unravel a geological mystery at the Red Mountain mine, located about 70 miles east of the campus. Some of the world's largest veins of pure magnesium...

2010-08-23 11:49:00

(PRZCF.OTCBB) (PH0.FRANKFURT) (TSXV.GR) VANCOUVER, Aug. 23 /PRNewswire-FirstCall/ - GREENLIGHT RESOURCES INC. (TSXV.GR), announces that it has received preliminary results from its mapping and prospecting on its Brazil Lake Lithium and Rare Metal property in Nova Scotia. Three new primary target areas have been identified, which are in addition to the known North and South pegmatite dikes which are currently being drilled. The three new targets, identified by pegmatite boulder float trains,...

2009-07-28 10:19:20

A new analysis of jade found along the Motagua fault that bisects Guatemala is underscoring the fact that this region has a more complex geologic history than previously thought. Because jade and other associated metamorphic rocks are found on both sides of the fault, and because the jade to the north is younger by about 60 million years, a team of geologists posits in a new research paper that the North American and Caribbean plates have done more than simply slide past each other: they have...

6b0e0acd28b9f106a95da03696c78dd81
2009-03-07 08:28:27

6,000 Square Miles in U.S. Might Turn Emissions to Harmless Solids To slow global warming, scientists are exploring ways to pull carbon dioxide from the air and safely lock it away. Trees already do this naturally through photosynthesis; now, in a new report, geologists have mapped large rock formations in the United States that can also absorb CO2, which they say might be artificially harnessed to do the task at a vastly increased pace. The report, by scientists at Columbia University's...

2008-07-17 03:00:30

By Rakovan, John The very first Word to the Wise column dealt with the term pegmatite (Rakovan 2003). This was especially fitting because pegmatites are one of the most important rock types or geologic environments for the production of beautiful and interesting mineral specimens. A qualitative assessment of this can be made through a simple review of mineral journals, where one finds that tourmaline, aquamarine (often referred to as t&a), and other pegmatite minerals comprise a large...

2008-07-17 03:00:00

By Anonymous THE TWENTY-FOURTH TECHNICAL SESSION of the Rochester Mineralogical Symposium (RMS) was held on 13 April 2007. Twelve abstracts were accepted and presented as oral papers. The review panel consisted of Dr. Steven Chamberlain, New York State Museum; Dr. Carl Francis, Harvard Univeristy; Dr. Robert King, Tewkesbury, Great Britain; Dr. Marian Lupulescu, New York State Museum; and Dr. George Robinson, Michigan Technological University. PSEUDOBROOKITE FROM THE NINE MILE PLUTON,...

2008-03-05 14:26:56

Earth scientists are in the business of backing into history -- extrapolating what happened millions of years ago based on what they can observe now. Using this method, a team of Cornell researchers has created a mathematical computer model of the formation of granulite, a fine-grained metamorphic rock, in the Earth's crust. By studying what were once pockets of hot, melted rock 13 kilometers (about 8 miles) deep in the Earth's crust 55 million years ago and calculating the period of...


Latest Metamorphic rocks Reference Libraries

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_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...

28_ef1c3b7eae22f41488df2450c5a5b451
2005-05-26 10:59:02

Garnierite is a mineral composed of hydrous nickel silicates a member of the serpentine group with formula: (Ni,Mg)3Si2O5(OH). Népouite is a synonym. Garnierite is important as a source of nickel and is mined from laterite deposits which are formed by intense weathering and secondary enrichment of ultramafic igneous rocks.

28_7ea4778c81fd8cde7aa462546b2ebb04
2005-05-26 10:50:45

Gneiss is a common and widely distributed type of rock formed by high grade regional metamorphic processes from preexisting formations that were originally either igneous or sedimentary rocks. Gneissic rocks are coarsely laminated and largely recrystallized but do not carry large quantities of micas, chlorite or other platy minerals. Gneisses that are metamorphosed igneous rocks or their equivalent are termed granite gneisses, diorite gneisses, etc. However, depending on their composition,...

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Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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