What is blast hole?
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Explain the minimum depth needed for a feature to be considered a canyon?
Explain how were sedimentary rocks created?
Soils take how many years to form?
What is ampourpose?
What is prospector?
What is magma?
why a cloud appears as black cloud and white cloud
What is magnetism?
What did radon detection in arid areas can help to explore?
Define granite?
What is 'geologic time'?
How are the layers of schist separated into alternating light and dark minerals?