Page 200 - Laboratory Manual in Physical Geology

A CTIVIT Y
Name: ______________________________________ Course/Section: ______________________ Date: ___________
Grains were not rounded or sorted much, so
mixed with some green silt, deposited, and
not transported very far from their source.
(compaction?) into rock.
Grains were
weathered.
they were
hardened
SEDIMENTARY ROCKS WORKSHEET
• Poorly sorted (The gravel is mixed
Textural and Other Distinctive How Did the Rock Form? Rock Name (See Figure 6.10) (Figure 6.9) Properties (Figures 6.3 and 6.9) Preexisting rock exposed on land (probably granite) was Breccia (Arkose breccia) • Mostly (~95%) angular to subangular 6.6 Hand Sample Analysis and Interpretation
with some sand and green silt)
gravel-sized grains

Composition (Figures 6.2 and 6.9) Detrital (Siliciclastic): • Mostly orange feldspar grains (~85%) • Some quartz (~10%) • Green silty matrix (~5%)

Sample Number or Letter Fig. 6.11

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