Jasperoid is a rare, peculiar type of metasomatic alteration and occurs in two main forms; sulfidic jasperoids and hematitic jasperoids. True jasperoids are different from jaspillite, which is a …

This paper considers only those jasperoids formed by replacement of limestone. Major problems involved in the origin of such jasperoid include: source of the silica; nature of solutions that …

Jasperoid in the United States; its characteristics, origin, and economic significance Professional Paper 710 By: T.G. Lovering

Definition of jasperoid i. A dense, usually gray, chertlike siliceous rock, in which chalcedony or cryptocrystalline quartz has replaced the carbonate minerals of limestone or dolomite; a …

Jasperoid is a rare, peculiar type of metasomatic alteration of rocks. Jasperoid is available in black, brown, colourless, green, grey, pink, white colors. The streak of a rock is the color of …

Jasperoid breccia composed of hematite and goethitic fragments in a limonitic matrix. Vuggy "barren" jasperoids from area south of Queen Creek mine.

Jasperoid is a rare and peculiar type of metasomatic alteration of rocks. It is formed by extreme alteration of wall rocks within a shear zone which may occur in sediments, andesites, trachytes …

Jasperoid is localized along high-angle faults, the thrust fault contact between the Webb and Devils Gate Formations, and five sedimentary contacts (Fig. 2). Jasperoid is best developed at …

An official website of the United States government. Here's how you know

This paper considers only those jasperoids formed by replacement of limestone. Major problems involved in the origin of such jasperoid include: source of the silica; nature of solutions that …