Pisolitic

The bauxite is earthy, and usually shows a concretionary or pisolitic structure similar to that observed in residual iron ores (p. 172). ❋ Unknown (1915)

It is thought that the solution and redeposition of the iron by organic acids from plant roots may be at least a contributing cause in the formation of this pisolitic texture. ❋ Unknown (1915)

The most valuable deposits are residual, and some parts have preserved the texture of the original rock, though with great increase in pore space; most of the ore, however, has the typical pisolitic structure. ❋ Unknown (1915)

He saw that the difference between these formations, in their structural aspect, and the hand-specimens in his collection of pisolitic and brecciated minerals was chiefly a matter of size; and that the resemblances in form were very close. ❋ Collingwood, W G (1911)

Above this is an ash bed, then a bed of breccia containing fragments of trachyte, then another bed of cinders, which looks like a rough sandstone, but is pisolitic, and contains pebbles of the size of a bean. ❋ Thomas Belt (1855)

The hill crops out through pisolitic limestone, in which marine fossils were observable. ❋ John Hanning Speke (1845)

Among other things, barren massive sulphide lenses have been identified at the top of the rhyolitic unit, along with lenses of so-called "pisolitic rhyolite" (likely chert in gel form), typical Selbaie-environment marker horizons. ❋ Unknown (2010)

Slide 24: • nonmetallic • NOT a mineral at all • yellow, brown, red • pisolitic (formed of small, pea-shaped beads) • 2 - 3 hardness ❋ Unknown (2008)