The rubric you used and the more-or-less likely one for my grading. _____/5 “logistics” Title, scale (bar and ratio), author, date, N arrow, explanation (rock units (oldest at the bottom) with symbols and ages, strike and dip, contacts, structures (faults/folds))
for my grading
Title, scale (bar and ratio), author, date, N arrow, explanation (rock units (oldest at the bottom) with symbols and ages, strike and dip, contacts, structures (faults/folds))
______/18 TOTAL POSSIBLE
Which way is N?
Way too heavy
The other side?
Need the WHOLE
N ratio scale
And move to top of page
Topo base from
SP Crater 7.5’ quadrangle
_____/5 rock types
_____/10 volcanic/structural evolution
be called an “executive summary” in some cases.
It should not be a detailed, blow-by-blow description
of every single aspect of the paper, but it should
contain enough information that the reader will gain
an appreciation for what the paper is about.
It should tell what the study is about, why it was
done, and what the main conclusions are.
but it should include concise descriptions of the RESULTS
of your work. Thus “The rocks at SP Crater were studied”
is NOT acceptable, but “Rock types at SP Crater include
Triassic alluvium, Precambrian basalt, and Ordovician
mudstone” is great (the difference? the first tell me what
you did, which is obvious anyway, and the second tells me
what you found, which is what I’m after). So, you will want
to include a few words about where SP Crater is (three to
five words, after “is located”), the rock types (in stratigraphic
order please), and the distinguishing features of the
volcano and the area. AVOID THE PASSIVE VOICE as
much as possible (what are better ways to say “the
basalt was seen” or “phenocrysts of olivine were found”?).
by GLG 240
Lake Mary is located ~ 16 km southeast of Flagstaff, AZ,
along Lake Mary Road. The rock layers are flat lying and include
Permian Coconino Sandstone, Permian Kaibab Limestone,
Triassic Moenkopi Formation, and Tertiary basalt.
The Coconino Sandstone is cross bedded and friable. Grains
are medium to coarse, well sorted, and rounded. Cross bedding
varies from high to low angle and is in several directions. The
Kaibab Limestone is well cemented and massive. Weathered
surfaces are strongly pitted and the rock effervesces in HCl. The
Moenkopi Formation consists of layers of differing resistance to
weathering and thickness. Thicker, more-resistant layers are
coarser than thinner, less-resistant layers. Lenses of platey
siltstone are rarely cross bedded. Basalt disconformably
overlies the Moenkopi Formation with an intervening baked
structure. A drill core taken from Lake Mary shows that the
stratigraphy below Lake Mary matches that of outcrops on the
mesas on either side of the lake. Joints in the Kaibab Limestone
parallel the fault on the northeastern side of the graben.
Paleozoic and Mesozoic rocks were deposited in environments
that varied from eolian (Coconino Sandstone) to marine (Kaibab
Limestone. Tertiary basalt was derived from an unknown vent
in the San Francisco Volcanic Field. Faulting occurred after
emplacement of the basalt, although precise timing is unknown.