Geography • Physical GeographyMedium
Which of the following sedimentary rocks is formed by the accumulation and lithification of organic remains, primarily calcium carbonate shells of marine organisms?
A. Sandstone
B. Shale
C. Chalk✓ Correct Answer
D. Gypsum
💡 Solution & Explanation
Chalk is an organic sedimentary rock formed primarily from the accumulated calcareous shells of microscopic marine organisms like coccolithophores. Sandstone and shale are clastic sedimentary rocks formed from mineral particles or weathered rock fragments rather than organic remains.
More Geography Physical Geography questions
- When examining atmospheric stability and vertical lapse rates, what physical condition defines absolute…
- Which local wind system, experienced during the pre-monsoon transition period in Kerala, is characterized by…
- Which of the following processes of chemical weathering involves the reaction of mineral compounds with…
- Which type of mass wasting involves the rapid movement of a mass of rock, debris, or earth down a slope along…
- Which meteorological phenomenon triggers sudden localized cloudbursts and flash floods in the steep narrow…