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Clastic rocks are
composed of fragments, or
clasts, of pre-existing
minerals and rock. A
clast is a
fragment of
geological detritus, chunks, and smaller...
-
within conglomerate are
called clasts,
while the
finer sediment surrounding the
clasts is
called the matrix. The
clasts and
matrix are
typically cemented...
- gravel-size
pieces of
clayey sediment into
shale or
mudstone rip-up
clasts.
Shale rip-up
clasts are
often found at the base of
sandy turbidites, in lag deposits...
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sedimentary rocks are
composed of rock
fragments (
clasts) that have been
cemented together. The
clasts are
commonly individual grains of quartz, feldspar...
- that
elongated clasts in
tills tend to
align with the
direction of ice flow.
Clasts in till may also show
slight imbrication, with the
clasts dipping upstream...
-
imbrication where the long axes of the
clasts are
oriented parallel to the flow direction. This
fabric is
characteristic of
clasts carried in
suspension and this...
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uplifting Catalan Coastal Ranges to the
southeast of the
basin and the
clast type is
dominated by Tri****ic
sedimentary rocks. The fan had an original...
- gastroliths.
Clasts from
beaches and
streams tended to have
reflectance values of less than 35%. Less than ten
percent of
beach clasts have reflectance...
- matrix-supported when
clasts constitute less than 15% of its volume.
Matrix support is
considered characteristic of
debris flow deposits, in
which clasts are supported...
-
pebbles or
larger clasts in a
matrix of sand, silt, or clay.
Metaconglomerate looks similar to conglomerate,
although sometimes the
clasts are deformed. The...
