An excuse to show off my rocky adventures. Or rocks. Or things.


2nd December 2010

Photo with 2 notes

Shaver Lake measuring tape.

Shaver Lake measuring tape.

Tagged: SierrasfeildworkShaverLake

30th November 2010

Photo with 2 notes

Dodecahedank - 
 
David K. Lynch:
Garnets are a family of neosilicate minerals with a distinctive, though somewhat variable, composition and similar crystalline properties. All garnets form as hard (6 – 8 on the Mohs scale of hardness) isometric crystals, typically rhombic dodecahedrons. Most garnets are reddish brown, though they occur in many colors. Garnets are primarily metamorphic in origin and vary from microscopic to a few centimeters in diameter. The largest single garnet crystal ever found is an astounding 7.5 ft (2.3 m) in diameter and is on display in the Natural History Museum, Bergen, Norway. When formed in schist garnets nucleate and grow suspended in the hot viscous rock, so every facet is well defined. These make attractive specimens because of the absence of any “attachment” damage such as with crystals from a vug or geode. Massive deposits of garnets are ground up and used as abrasives – hence the brown color of sandpaper. Exceptionally clear or colored garnets are used a gemstones.
The garnets pictured here came from a deposit of garnet schist (upper part of picture) in Baja, Mexico. They are almandine garnets and are near perfect rhombic dodecahedrons (lower right). Most of these were covered with a rusty deposit that was easily scraped off. This is one of the richest deposits of garnets I’ve ever seen; in some places garnets comprised more than half of the volume of the schist. So densely packed were the garnets that some formed in clusters as seen at the lower left. A US penny is included for size comparison.

Dodecahedank - 

David K. Lynch:

Garnets are a family of neosilicate minerals with a distinctive, though somewhat variable, composition and similar crystalline properties. All garnets form as hard (6 – 8 on the Mohs scale of hardness) isometric crystals, typically rhombic dodecahedrons. Most garnets are reddish brown, though they occur in many colors. Garnets are primarily metamorphic in origin and vary from microscopic to a few centimeters in diameter. The largest single garnet crystal ever found is an astounding 7.5 ft (2.3 m) in diameter and is on display in the Natural History Museum, Bergen, Norway. When formed in schist garnets nucleate and grow suspended in the hot viscous rock, so every facet is well defined. These make attractive specimens because of the absence of any “attachment” damage such as with crystals from a vug or geode. Massive deposits of garnets are ground up and used as abrasives – hence the brown color of sandpaper. Exceptionally clear or colored garnets are used a gemstones.

The garnets pictured here came from a deposit of garnet schist (upper part of picture) in Baja, Mexico. They are almandine garnets and are near perfect rhombic dodecahedrons (lower right). Most of these were covered with a rusty deposit that was easily scraped off. This is one of the richest deposits of garnets I’ve ever seen; in some places garnets comprised more than half of the volume of the schist. So densely packed were the garnets that some formed in clusters as seen at the lower left. A US penny is included for size comparison.

Tagged: GarnetsRocksShiney

Source: epod.usra.edu

28th November 2010

Photo with 1 note

Earth as art.

Earth as art.

27th November 2010

Video with 2 notes

Getting lost in Appalacha

Tagged: Old GrowthForestHikingAppalachaTennessee

27th November 2010

Photo with 1 note

Dragonfly world.

Dragonfly world.

Tagged: Lost CoastHikingBeach

27th November 2010

Photo reblogged from with 19 notes

27th November 2010

Question

fuckyeahzeenix-deactivated20101 asked: OMG HAI!!!!!!!!

Huzzai

27th November 2010

Photo with 1 note

Lost coast

Lost coast

27th November 2010

Question

tumblrbot asked: WHAT IS YOUR EARLIEST HUMAN MEMORY?

Digging in dirt.

24th November 2010

Photo with 1 note

On the way back down Mt Diablo, Santa Cruz Island.

On the way back down Mt Diablo, Santa Cruz Island.

Tagged: Santa Cruz Island