diatomaceous chert

Игры ⚽ Нужен реферат?

Chert — For the Spanish municipality, see Xert. Chert Chert ( / … Wikipedia
Diatom — For a molecule of two atoms, see Diatomic molecule. Diatoms Marine diatoms Scientific classification Domain … Wikipedia
Micropaleontology — Fusulinid (Triticites) from the Plattsmouth Chert, Red Oak, Iowa (Permian). Micropaleontology (also sometimes spelled as micropalaeontology) is the branch of paleontology that studies microfossils. Contents … Wikipedia
Silicon dioxide — Silica redirects here. For other uses, see Silica (disambiguation). Silicon dioxide … Wikipedia
Opal — For other uses, see Opal (disambiguation). Opal An opal bracelet. The stone size is 18 by 15 mm (0.7 by 0.6 in) General Category … Wikipedia
Cristobalite — spheres formed via devitrification (loss of silica) from the obsidian matrix (California, USA) 5.9×3.8×3.8 cm. General Category Silicate mineral … Wikipedia
Portuguese Bend — The Portuguese Bend region is the largest area of natural vegetation remaining on the Palos Verdes Peninsula.Though once slated for development (and in fact the projected route of Crenshaw Boulevard through the area still shows on many maps), the … Wikipedia

Словари и энциклопедии на Академике