Browse Items (1651 total)

brecciated

Pods and lenses of green diopsidite commonly occur along with the marbles. They are often composed of over 90% diopside.
Thin section contains diopside.

Ichnogenus:

Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Family: Genus: Species:

Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Family: Genus: Species:

Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Family: Genus: Species:

Hand Sample: Hypocrystalline, porphyritic, diabase with subhedral plagioclase and alkali feldspar (weathered to green) crystals approximately 1cm in length. Matrix is brown-black color. Weathered to white. Intensive weathering on one side to light…

Quarred for monumental stone, ophitic texture in thin section, minor amount of opaques

Ophitic texture in thin section, some opaques

Ophitic texture in thin section, plagioclase exhibits some alteration to sericite

Shows considerable fracturing, thin section examination shows ophitic texture

Holocrystalline, medium grained, anhedral, ophitic, dibastic crystals. Low silica percentage (46.3%) for a Diabase, bordering on ultramafic compostion. Calcite is present on weathered surfaces, but not on fresh surfaces. (FOV: 3.2mm)

Hand Sample: Porphyritic diabase with coarse to very coarse grained subhedral pink-green plagioclase laths approximately 3cm in length set in a gray-black matrix. Inclusions of matrix present within plagioclase laths. Weathers to orange-brown.

1:24000

1:24000