Diabase
Quarred for monumental stone, ophitic texture in thin section, minor amount of opaques
Geoscience Service & Supplies
SE-28
Diabase
Ophitic texture in thin section, some opaques
Geoscience Service & Supplies
SE-26
Diabase
Ophitic texture in thin section, plagioclase exhibits some alteration to sericite
Geoscience Service & Supplies
SE-25
Diabase
Shows considerable fracturing, thin section examination shows ophitic texture
Geoscience Service & Supplies
SE-24
Diabase
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)
Not given
Western Minerals, Inc.
FR-6