-
Latite is an igneous,
volcanic rock, with aphanitic-
aphyric to
aphyric-porphyritic texture. Its
mineral ****emblage is
usually alkali feldspar and plagioclase...
-
absence of
phenocrysts is
often noted when a rock name is determined.
Aphyric rocks are
those that have no phenocrysts, or more
commonly where the rock...
- feldspars" of the
Rhomb Porphyry group,
dated to 460,000–360,000
years ago.
Aphyric phonolite lavas, "commonly
underlain by
basal obsidian horizons", of the...
- OSI/OSNI grid T032917 Topo map OSI
Discovery 56
Geology Mountain type
Aphyric granodiorite, (Percys
Table Granodiorite)
Climbing Easiest route Glen of...
- quartz, the
latter in the form of xenocrysts;
rocks on the
spatter cone are
aphyric. A line of
volcanoes extends from
Cerro Cebollar to
Cerro Palpana in south–north...
-
ranging from 0.039 to 0.039
inches (1 to 1 mm).
Darker lapilli are
mostly aphyric (lacking phenocrysts).
Pilot Butte is extinct. Its
exact age is unknown...
-
Location Wicklow,
Ireland Parent range Wicklow Mountains OSI/OSNI grid T0232195992 Topo map OSi
Discovery 56
Geology Mountain type
Aphyric granodiorite...
-
Location Wicklow,
Ireland Parent range Wicklow Mountains OSI/OSNI grid T038941 Topo map OSi
Discovery 56
Geology Mountain type
Aphyric granodiorite Bedrock...
- centre. On top of this unit, an
andesitic cone formed,
dated at 9 mya. Some
aphyric phenobasalts cover surfaces of the
second unit. The
early phase rhyolites...
- that may have
formed half a
million years ago. Its
eruption products are
aphyric.
Previously in 1977, this
crater has been
identified as a
meteor crater...
