- tuff,
while rock
containing 25% to 75% ash is
described as
tuffaceous (for example,
tuffaceous sandstone). Tuff
composed of
sandy volcanic material can...
-
Tuffaceous sandstone layers in New Mexico...
-
Limestone –
micritic limestone with
tuffaceous turbidites and
minor chert;
Upper Burgos Member – Limestone,
tuffaceous sandstone,
siltstone and mudstone...
- the
subsoil and
underneath is
tuffaceous material of
varying degrees of
disintegration and weathering. This
tuffaceous material is
exposed by extensive...
- late
Permian around 255.02 Ma. This
formation includes tuff,
tuffaceous sandstone,
tuffaceous siltstone, claystone, and chert.
Often noticed at
Nobbys Head...
-
geologic formation in Panama. The
formation consists of
tuffaceous sandstones, conglomerates,
tuffaceous shales and
algal and foraminifera-rich limestones,...
- concludes: "The Duke
quarry phyllite was
derived from argillite, tuff or
tuffaceous sandstone, and
volcanic breccia.
Occurrence of
laminated argillites suggests...
- the
ocean it
forms a
littoral cone, a
small cone-shaped ac****ulation of
tuffaceous debris formed when the
blocky ʻaʻā lava
enters the
water and explodes...
-
interbedded with
tuffaceous mudstones and sandstones, and some pumice. The
unnamed lower member is a hard
platy shale alternating with beds of
tuffaceous mudstones...
-
belonging to the
Middle Tertiary: rhyodacites,
rhyolites and
ignimbrites with
tuffaceous sediments at the base outcrops;
andesitic rocks and
felsitic late Early...
