Examlex
Which of the following is often used as the focus of attention in concentrative meditation?
Limestone
A sedimentary rock primarily composed of calcium carbonate, often formed from the skeletal fragments of marine organisms.
Karst Topography
A terrain shaped by the dissolution of soluble rocks like limestone, featuring sinkholes, caves, and subterranean rivers.
Travertine
A form of limestone deposited by mineral springs, especially hot springs, known for its layered, textured appearance.
Limestone
A sedimentary rock composed mainly of calcium carbonate, typically formed under marine conditions.
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