Iron nodules are clay-coated pseudomorphs
of pyrite framboids (Fig.
However, subsoils formed in saprolite may contain fragile pseudomorphs
of primary minerals resulting in minor fabric alteration by ripping.
The Eel Bed of the Kokomo Limestone contains sedimentary structures that include bird's-eye (fenestrate) structures, algal mats, gypsum/anhydrite blebs and pseudomorphs
, penecontemporaneous dolomite, and intraformational storm tide deposits, that we interpret as indicative of a supratidal (Shinn 1983; Hardie & Shinn 1986) depositional environment.
The eastern dyke is alkalic, and contains pseudomorphs
of olivine phenocrysts in a fine-grained groundmass of plagioclase, brown amphibole, and pyroxene.
2002, Organic mats, evaporite pseudomorphs
and soft-sediment deformation in quartz arenites of the Cambro-Ordovician Nepean Formation: GAC-MAC, Saskatoon 2002, Program with Abstracts, [http://gac.
Considering the structure of the shells, all examined specimens of Mickwitzia appeared to be pseudomorphs
of apatite-cemented quartzose silt by shells (Pl.
of crystals of magnetite, aegirine-augite, and pyrrhotite that remain in the fluorite ores further support the interpretation that the original replaced rocks commoly were pegmatitic carbonatites.
Coarsely bladed quartz pseudomorphs
after calcite in veins and in the breccia matrix is suggestive of a boiling zone, typically associated with low sulfide epithermal gold mineralization.
The presence of some plant pseudomorphs
of calcitic ash suggest minimum disturbance of the burnt remains.
Instead, the subhedral shape of the calcite crystals suggests that they are pseudomorphs
after gypsum and that the crystal-laminated interval exhibits a primary fabric that records little post-depositional deformation other than compaction.
The most attractive of these prospects is the Dolnoseltsi prospect where a two-metre wide vein exposed in a recent trench exhibits strong epithermal textures including bladed carbonate pseudomorphs
, crustiform-colloform banded veins and massive chalcedony.
The SEM photographs of sand-sized gibbsite indicate that they are pseudomorphs
after feldspars (Fig.