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))
• _____/3 strikes and dips on bedded rocks
• _____/10 appearance (neatness, spelling, correct
line weights, color LIGHTLY, symbols in all the rock
units, no eraser marks everywhere)
• N is to the top of the page AND all writing on the map
is up to the north
______/18 TOTAL POSSIBLE
Nancy who?
date
Which way is N?
Way too heavy
lineweight
Only one???
Whats on
The other side?
EXPLANATION
(Symbols)
ORDER!!
And ages
?
____ ?
N ratio scaleSome title!
TOO
Dark and
unlabelled
Need the WHOLE
contact
And move to top of page
Topo base from
SP Crater 7.5’ quadrangle
ABSTRACT
_____/2 title
_____/3 location
_____/5 rock types
_____/10 volcanic/structural evolution
The abstract summarizes the entire paper. It may
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.
An abstract does NOT need to include details of location,
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”?).
Structure and stratigraphy of the Lake Mary area
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
soil horizon.
The valley in which Lake Mary lies is an example of a graben
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.