chert

• Твёрдая, плотная осадочная порода, состоящая из микрокристаллического кварца, разновидности кремнезёма.

A hard, dense, sedimentary rock composed of microcrystalline quartz, a variety of silica.

неисчисляемое

1. Microcrystalline quartz rockC1formalscientific

   A hard, dense sedimentary rock composed of microcrystalline quartz, often found in nodules or layers within limestone.

   Кремень

   • The geologist identified the sample as chert due to its conchoidal fracture.
   • Ancient toolmakers used chert to create sharp-edged blades and arrowheads.
   • Chert nodules are commonly found embedded in chalk deposits.

   Синонимыflint