-
Porphyry (/ˈpɔːrfəri/ POR-fə-ree) is any of
various granites or
igneous rocks with co****-grained
crystals such as
feldspar or
quartz dis****d in a fine-grained...
- thick, made up of
quartz porphyroids and tuff,
mainly in the west (Hohe Salve,
Hahnenkamm and Wildseeloder). Over the
porphyroids lie
various horizontal...
- are
mostly very-co**** grained,
ranging in type from
microgranites to
porphyroid granites. The m****if is
tilted in a north-westerly
direction and was cut...
- and
geochemistry of the
pyroclastics of the
Lower Ems/Lower
Devonian (
porphyroids) in the
southern Rhenish Slate Mountains. (=
Geological treatises Hessen...
- bottom): Génis
greenschist Génis
sericite schist Puy-de-Cornut
arkose Génis
porphyroid The Génis
greenschist is the
youngest formation of the Génis Unit. The...
- type
foothills Rock type(s) Tri****ic carbonate, quartzite/quartz conglomerate,
arkose slate-breccia-
porphyroid-series (Wechsel slate,
Alpine verrucano)...
- chlorite, and muscovite), phyllites,
gneisses (plagioclase), amphibolites,
porphyroids, stromatites,
schists (graphite), greenschist, quartzite, and sedimentary...
-
igneous origin for the rock. Such porphyry-schists have been
called porphyroids or
porphyroid-schists, and in the
United States the name
aporhyolite has been...
- developed. One
common form of
aggrading neomorphism is
called porphyroid neomorphism.
Porphyroid neomorphism occurs when a
small number of
large crystals form...
- biotites, chlorites, calcites),
schists (graphites),
green schists, and
porphyroids,
sedimentary rocks:
mainly quartzites, meta-conglomerates, and meta-tuffs...
