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Latest Geochemistry Stories

Amazon River Found To Be A Metabolic Hotspot
2013-05-21 07:12:37

April Flowers for redOrbit.com - Your Universe Online The Amazon rainforest is known as the lungs of the planet because it inhales carbon dioxide and exudes oxygen into the atmosphere. The plants of the forest use the carbon dioxide to promote leafy growth, which eventually falls to the ground and decomposes or washes away from the region´s plentiful rainfall. Until recently, the belief was that most of the rainforest´s carbon floated away on the Amazon River, ending up deep...

Charcoal From Wildfires Enters Waterways And Works Its Way To Oceans
2013-04-20 07:14:14

redOrbit Staff & Wire Reports - Your Universe Online New research claims charcoal created from wildfires does not remain in the soil as previously believed, but is instead transported into the sea by rivers, where it ultimately enters the carbon cycle. That determination was made by an international team of researchers, including Thorsten Dittmar from the Max Planck Institute for Marine Microbiology (MPI) in Bremen and Rudolf Jaffé from Florida International...


Latest Geochemistry Reference Libraries

28_0d277ca2b0d8b8cd79fb9cfa322f77e1
2005-05-26 11:01:52

Diorite is a grey to dark grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), hornblende, and/or pyroxene. Varieties deficient in hornblende and other dark minerals are called leucodiorite. It is often described as "salt and pepper" when composed largely of light-colored minerals randomly interspersed with dark minerals. When olivine and more iron-rich augite are present, the rock grades into ferrodiorite, which is transitional to...

28_30e95d7bc9a84ffe78f930c8704eb5b2
2005-05-26 11:00:22

Gabbro is a dark, coarse-grained, intrusive igneous rock chemically equivalent to basalt. It is a plutonic rock, formed when molten magma is trapped beneath the Earth's surface and cools slowly into a hard, coarsely crystalline mass. It is dense, greenish or dark-colored and contains varied percentages of plagioclase feldspar, pyroxene, amphibole, and olivine (called olivine gabbro when olivine is present in large quantities). Quartz gabbros are also known to occur and are probably derived...

28_c04342a5025a8ae7a0de88f6dc83278c
2005-05-25 11:55:01

Syenite is a coarse-grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or present in relatively small amounts. The feldspars are alkaline in character and the dark mineral is usually hornblende. Soda-lime feldspars may be present in small quantities. The term syenite was originally applied to hornblende granite like that of Syene in Egypt, from which the name is derived. Syenite is not a common rock, some of the more important...

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Word of the Day
barghest
  • A goblin in English folklore, often appearing in the shape of a large dog and believed to portend imminent death or misfortune.
  • A ghost, wraith, hobgoblin, elf, or spirit.
The origin of 'barghest' is not known, but it may be from perhaps burh-ghest, town-ghost, or German Berg-geist (mountain spirit) or Bär-geist (bear-spirit).
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