Copyright by Nysha Chaderton 2009 - The University of Texas at ...

interpreted to be a stacked channel-levee sequence that has been deposited in a mid-fan
depositional setting.
Mineralogy
Grains are in point contact with each other, but there appears to be significant
amount of relict pore space present. There is minor biotite, white mica, rare chert and
volcanic rock fragments, and minor amounts of hematite and kaolinite cement. Larger
amounts of K feldspar and plagioclase feldspar are present. Quartz overgrowths are
present but broken. No other quartz cementation is observed (Figure 3.8). A large number
of quartz grains are fractured to varying degrees and secondary intragranular fracture
porosity is moderate.
Sample: SGRF 19C
This sample was taken from bed 19 in the measured section labeled SGRF-
Sleeping Giant Ridge; section F (Figure 3.9). This bed is comprised of a 170 cm of
coarse-grained to medium-grained sand that has at least two secondary erosive surfaces
within the bed. The sample was taken 10 cm from the top of this bed that has been
interpreted to be a channel-fill deposit.
Mineralogy
There is minor biotite, white mica, a single chlorite grain, chert, and minor
amounts of chlorite and kaolinite cement. K feldspar and plagioclase feldspar are present,
some of these grains are being altered and a few feldspar grains are partly replaced by
kaolinite cement. Quartz overgrowths are present but broken. No other quartz
cementation is observed (Figure 3.10). A number of quartz grains are fractured to
produce secondary intragranular porosity.
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