Science Quiz / 'O' in Geology

Random Science or Geology Quiz

Can you name the answers to these Geology questions where all of the answers begin with 'O'?

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Also try: 'N' in Geology
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Black or red chalcedony with parallel bands that are usually white in color (#1 above)
Black, glassy felsic igneous rock that cooled rapdily; used to make sharp blades that kill White Walkers
Iron/Magnesium nesosilicate especially common in mafic and ultramafic igenous rocks (#3 above)
The release of juvenile gases and water to the surface from a magma source (e.g., from fumaroles)
A crescent-shaped lake that forms when a meandering stream changes course (#2 above)
This Epoch saw widepsread cooling after the warm Eocene and the opening of the Drake Passage
Sorted and stratified sediment deposited in front of a glacier by meltwater streams
This Geologic Period saw the highest sea levels of the Paleozoic and major increases in marine biodiversity
A fluid iron-nickel layer deep within the Earth; thought to influence Earth's magnetic field
A small sphere (millimeters in size) of calcium carbonate with a concentric internal structure
A dark-colored shale containing an unusual amount of solid organic material (kerogen)
A mountain-building episode associated with compressive tectonic processes, folding, and reverse faulting
An exposure of bedrock formed naturally (e.g., by erosion) or by humans (e.g., by road construction; #4 above)
A fault that has both vertical and horizontal displacement
The most common element in Earth's crust (it comprises 46.6% of crustal mass)
Rock from which an economically sufficient amount of elements/compounds can be extracted
The principle that sedimentary layers are always deposited (nearly) horizontally

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