"Lydite" redirects here. For the explosive, see Lyddite.
Outcrop of Franciscan radiolarian chert in San Francisco, CaliforniaRadiolarian chert outcrop near Cambria, California. Individual beds range from about 2 to 5 cm thickRadiolarite (Jurassic) from the Alps.
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.[1]
^Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, J.A., eds. (2005) Glossary of Geology (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. ISBN 0-922152-76-4
Radiolarite is a siliceous, comparatively hard, fine-grained, chert-like, and homogeneous sedimentary rock that is composed predominantly of the microscopic...
basalt. Basanite (not to be confused with bassanite), Lydian stone, and radiolarite (a.k.a. lydite or flinty slate) are terms used to refer to several types...
condition and biogenic silica/detrital fluxes of the Middle Jurassic Radiolarite in Tethys (Sogno, Lombardy, N-Italy): Possible link with glaciation?"...
tools are made from cryptocrystalline materials such as chert, flint, radiolarite, chalcedony, obsidian, basalt, and quartzite via a process known as lithic...
oxides and hydroxides of iron Mercury, (as liquid) Moldavite Mookaite/Radiolarite Obsidian—volcanic glass; non-crystalline structure, a silica rich glass...
still deposited. An example of a rock formed of silica skeletons is radiolarite. When the bottom of the sea has a small inclination, for example, at...
responsible for extracting silica from seawater from the Jurassic and later. Radiolarite consists mostly of remains of radiolarians. When the remains are well-cemented...
Calcareous Alps deposited during the Upper Jurassic. The open marine radiolarite is very rich in silica. The Ruhpolding Formation derives its name from...
INIST 14692468. Racki, G; Cordey, Fabrice (2000). "Radiolarian palaeoecology and radiolarites: Is the present the key to the past?". Earth-Science Reviews. 52 (1):...
radiolarian fossils include Actinomma, Heliosphaera and Hexadoridium. Radiolarite Smalley, I.J. (1963). "Radiolarians:construction of spherical skeleton"...
and Zeepaard Formation and is overlain by the Muderong Shale, Windalia Radiolarite and Tamala Limestone. At its type section at Mardathuna Station, northeast...
stones but is more brittle. Other hard stones such as flint, chert, radiolarite, chalcedony, basalt, and quartzite. Other materials that have been used...
Ligure Basin were situated above ophiolite and ended up with abundant radiolarite fossils in limestone. During the Cretaceous, global high sea levels and...
during stone age, 7000 years BC. At the Bärenkopf, a small mine for radiolarite was found. This was mined to produce stone tools and arrowheads. The...
forty thousand years ago, Neanderthal humans used natural outcrops of radiolarite or chert around this plain to make stone tools. There are several routes...
cherts from the Tournaisian age, and then red limestone, red shale and radiolarites were formed in the Visean age. Mountain Limestone is a thick black lifeless...
pillowed spilite, prehnite and trachyandesite, as well as shale with radiolarite fossils. Uranium-lead dating of zircon and muscovite grains from the...
Austrian state of Tyrol, northwest of Landeck. The summit consists of radiolarite rocks preventing it from eroding. Due to its height, it is called the...
They were made predominantly of local raw materials: flint, chert and radiolarite. QA 3 is the largest of the excavated sites, located near a modern village...
eastern Alps. In these, deep marine sediments were deposited, such as radiolarites and lutites. The divergent movement of the European and African plates...
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