-
define tuffite. The
classification present in the IUGS
recommendation are
based on the
definition established by
Schmid (1981).
Shvetsov defined tuffites as...
- foraminifera, pteropods,
siliceous fossils Volcanogenic constituents:
Tuffites,
volcanic ash, montmorillonite, cristobalite,
zeolites Terrigenous constituents:...
-
considered Oxfordian to
early Tithonian in age
based on lead-uranium
dating of
tuffites within the unit. The 420 to 700
metres (1,380 to 2,300 ft)
thick formation...
- by
average clast size and
percentage of
pyroclastic material.
Peperite Tuffite Fisher,
Richard V. (1961). "Proposed
classification of
volcaniclastic sediments...
- rock
bodies Sillar –
Variety of
rhyolite containing fragments of
andesite Tuffite – Tuff
containing both
pyroclastic and
detrital materials Fisher, Richard...
-
Volcanic Group.
These are
overlain by the sandstones, siltstones,
tuffs and
tuffites of the Cwm
Eigiau Formation.
Within the Nant
Ffrancon sequence are a variety...
-
composed primarily of
fluvial sandstones alongside shales and
volcanic tuffites The
formation preserves fishes,
crocodylomorphs and some
dinosaur taxa...
-
Thickness Several hundred metres Lithology Primary Sandstone, siltstone,
tuffite Other Mudstone Location Coordinates 52°30′N 116°42′E / 52.5°N 116.7°E...
- in its
lowest Las
Chacritas Member.
Interbedded with
these are
volcanic tuffites. It is
divided into two members, the Las
Chacritas Member, and the overlying...
-
Falla Formation Thickness 237.5 m (779 ft)
Lithology Primary Sandstone,
tuffite Other Climbing-ripple lamination,
horizontal lamination, and ac****ulations...
