Is there a question to go with this? if so i can potentially help you.
Detrital: A sedimentary rock composed of lithified sedimentary particles of previous rock types.
Chemical: A sedimentary rock created by the evaporation and subsequent crystallization of mineral rich fluids.
Organic: A sedimentary rock composed of the remains of lithified plants (coal), or animals (limestone).
The answer to your question is eligibility for the national merit scholarship program
