botryoidal


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Related to botryoidal: botryoidal tissue
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Synonyms for botryoidal

resembling a cluster of grapes in form

References in periodicals archive ?
(2017b) reported botryoidal calcite speleothems associated with pyrite and abundant bladed-euhedral barite in small-scale fracture-controlled cave systems in Silurian Aeronian carbonate rocks exposed in Kalana quarry, Central Estonia.
The hyalite locally fills the fractures completely, but more commonly it occurs as isolated blebs and botryoidal coatings up to 3 cm in thickness, in most places covering less than 10% of the surface.
Botryoidal goethite: a transmission electron microscope study.
The surface of the crusts have a botryoidal morphology (Fig.
Botryoidal crusts about 1 mm thick line cavities in the nodules and cement fragments of crandallite in some specimens; some cavities are entirely filled, like amygdules.
2), a large tabular body of fault breccia is composed of felsic rock cemented by manganese oxides and containing massive botryoidal psilomelane and braunite, as well as crystals and needles of manganite in rugs with barite.
Joints cutting the platinum-bearing veins are typically lined by botryoidal crusts of bright peacock-blue chrysocolla (Wagner, 1925).
It forms thin botryoidal cavity linings and small spheroids which are orange, green and yellow-green.
Botryoidal gray-green plumbian austinite crystals (to 0.5 mm) have been found coating fracture surfaces with mimetite in the upper stope of the Brown Monster mine.
Also noteworthy are pale blue to almost colorless "botryoidal" crusts of fluorite crystals showing abundant twinning and edge modifications.
The botryoidal matrix coatings of smithsonite are strikingly two-toned, with lustrous, wet-looking, pale green to dark forest-green regions, in bands to 2 cm thick over grayish limestone.
Later finds included pale yellow-green prisms to 2 cm or so and bright green botryoidal encrustations on matrix.
Minerals found at the Force Crag mine include sphalerite crystals (large, black to dark brown and lustrous) that are sometimes partially covered by honey-yellow drusy to botryoidal siderite.
They are botryoidal growths, deep black and (in the best specimens) extraordinarily smooth-surfaced and lustrous, in some cases reaching giant sizes.