Define chert.
Understand the Problem
The question is asking for a definition of 'chert', which is a type of sedimentary rock. This requires looking up geological terminology.
Answer
Chert
Chert is a hard, fine-grained sedimentary rock composed of crystals of quartz (silica) that are very small in size.
Answer for screen readers
Chert is a hard, fine-grained sedimentary rock composed of crystals of quartz (silica) that are very small in size.
More Information
Chert breaks with a conchoidal fracture, often producing very sharp edges. Historically, it was used by Native Americans to make tools and weapons.
Sources
- Chert - Wikipedia - en.wikipedia.org
- Chert - Geology.com - geology.com
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