Radiolarite

Outcrop of Franciscan radiolarian chert in San Francisco, California

Radiolarian chert outcrop near Cambria, California. Individual beds range from about 2 to 5 cm thick

Mookaite from the Kennedy Ranges, near Gascoyne Junction, Western Australia in the permanent collection of The Children’s Museum of Indianapolis.

Radiolarite is a siliceous, comparatively hard, fine-grained, chert-like, and homogeneous sedimentary rock that is composed predominantly of the microscopic remains of radiolarians. This term is also used for indurated radiolarian oozes and sometimes as a synonym of radiolarian earth. However, radiolarian earth is typically regarded by Earth scientists to be the unconsolidated equivalent of a radiolarite. A radiolarian chert is well-bedded, microcrystalline radiolarite that has a well-developed siliceous cement or groundmass.

单词	Flinty slate
释义	Flinty slate 英语百科 Radiolarite Radiolarite is a siliceous, comparatively hard, fine-grained, chert-like, and homogeneous sedimentary rock that is composed predominantly of the microscopic remains of radiolarians. This term is also used for indurated radiolarian oozes and sometimes as a synonym of radiolarian earth. However, radiolarian earth is typically regarded by Earth scientists to be the unconsolidated equivalent of a radiolarite. A radiolarian chert is well-bedded, microcrystalline radiolarite that has a well-developed siliceous cement or groundmass.
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Flinty slate

Radiolarite