Fondling my Rocks!!
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ArishMell · 70-79, M
A fine collection!
I don't know Nevada's general geology but might I be right to guess as:
The first and possibly second look like some sort of banded gneiss.
Number 3 similarly but unconformable with the right-hand side of it. Without knowing its bed-rock origin I could be far wrong.
Alternatively these three are from some sort of calcite or mineral-vein deposits coloured by its metallic minerals: the base in No.3 might be a limestone. Or are marble: metamorphosed limestone.
Number 4 seems a conglomerate of well-rounded, river or beach pebbles in a (limestone?) matrix.
Number 5: I don't know, but I think igneous and the greeny-blue tinge suggests one rich in the mineral olivine. Which would add weight to my metamorphic and mineral-vein guesses.
What do you identify them as?
I don't know Nevada's general geology but might I be right to guess as:
The first and possibly second look like some sort of banded gneiss.
Number 3 similarly but unconformable with the right-hand side of it. Without knowing its bed-rock origin I could be far wrong.
Alternatively these three are from some sort of calcite or mineral-vein deposits coloured by its metallic minerals: the base in No.3 might be a limestone. Or are marble: metamorphosed limestone.
Number 4 seems a conglomerate of well-rounded, river or beach pebbles in a (limestone?) matrix.
Number 5: I don't know, but I think igneous and the greeny-blue tinge suggests one rich in the mineral olivine. Which would add weight to my metamorphic and mineral-vein guesses.
What do you identify them as?
icedsky · 51-55, M
@ArishMell The top 3 photos are all banded calcite. Theres a good spot west of Las Vegas easy to get to and basically just pick the stuff up by the truckload. The 4th is another calcium deposit called Tuffa. From the Pyramid lake area. The last one is a metamorphic rock. A Blue Schist. Not fully cooked low pressure metamorphic rock.