Science Quiz / 'O' in Geology

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

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