Download Grading Rubric for Emigrant Pass Report (130 pts total)

ERTH 620 — Field Methods — Spring 2017
Grading Rubric for Emigrant Pass Project
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Grading Rubric for Emigrant Pass Report (130 pts total)
Map and cross section components – (40 pts)
Map (25)

Correct and accurate portrayal of contacts (fault vs depositional; solid vs dashed vs
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dotted)?

Unit labels on map and cross section
2

Ample bedding attitudes throughout areas traversed in the field
2

Correct plotting of attitudes and other structural data?
2

Major normal faults are shown to extend across map area, even where concealed
2

Mapped Quaternary faults in the northwest corner of the map area
1

Reasonable depiction of faults in ‘vortex’ areas
2

Anticline axes mapped where appropriate
2

Bedding attitude shown in Tmc (important attitude to have on map)
2

Draftsmanship (e.g., neatness, line work, coloring, etc.)
4
Cross Section (5 pts)

Identical match between contacts and structures on map and on cross section (with
the exception of contacts within the Carrara. Please show all 6 members on cross
2
section)

Viable subsurface projection of stratigraphy and structure

Appropriate use of lithologic symbols
1

No vertical exaggeration
1

Draftsmanship
1
Map and Cross Section Explanation (10 pts)
(One explanation for both map and cross section)
*Please use the examples for map units and symbols that were handed out at the beginning of camp

Explanation of both map units and map symbols (i.e., appropriate layout)?
2

Units listed from youngest (top) to oldest (bottom)
2
To account for only showing three members of the Carrara Formation on your map, your
explanation should include your map unit (3) member designations and cross section (6)
member designations
ERTH 620 — Field Methods — Spring 2017
Grading Rubric for Emigrant Pass Project
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
Meaning of all symbols shown on map and cross section fully describe
3

Accuracy and completeness of descriptions
3
Report and Strat Column (90 pts)
Introduction (5 pts)
o
Geographic and tectonic setting
2
o
Members in mapping party
1
o
Methods used during field mapping
1
o
Statement on report contents
1
Stratigraphy (25 pts)
Regional Stratigraphic Framework
o
Description of stratigraphic framework
2
Map Unit Descriptions
o
Complete lithologic descriptions for all map units (include all 6 Carrara
2
members)
o
Brief mention of the older fanglomerate unit, in particular that tilting of the
1
unit records the amount and potentially the timing of basin and range
extension
o
Map Unit Descriptions – 20 pts (20 great, 18-A-, 16-B, 14-C+, etc….)
20
Structure (16 pts)
o
Order of descriptions: in order from oldest to youngest
1
Folds and Associated faults(?) pre-Basin and Range Faults (6 pts)
o
Emigrant pass anticline (EPA)
o
Units involved in folding
2
o
Fold orientation (includes stereonet data to constrain hinge-line orientations)
2
o
Structural complexity in the hinge zone of the EPA
2
o
Characterize (to best of your ability) the faulting that you observed in the
vicinity of the anticline hinge zone area
Basin and Range Normal Faults (9 pts)
o
General description of major faults in the area (e.g., mention of numerous
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nature normal faults, map patterns they make, strikes, dip directions etc).
o
That the normal faults offset and repeat hinge-zone structures of the EPA
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ERTH 620 — Field Methods — Spring 2017
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Grading Rubric for Emigrant Pass Project
For faults with large displacement, are offsets estimated by stratigraphic
3
1
throw or otherwise)?
o
Constraints on amount of extension-related tilting in the Nopah Range (i.e.
2
the importance of Tmc)
o
Stereonet back rotatation of Nopah Range tilt based (on orientation of Tmc)
1
Geologic History (4 pts)
o
Summarize as completely as possible (2) from oldest to youngest (2) as
4
recorded in the stratigraphy and structures of the Emigrant Pass map area
Overall Writing Quality (10 pts)
o
Organization and grammar
5
o
Spellchecked and proofread
5
Stratigraphic Column – 30 points
o
*Although strat column is included with report, it will be considered as a
separate project from report worth 30 points
Accuracy of measured thicknesses
5
o
Completeness of lithologic details (e.g., anemones, cross-bedding,
10
o
Appropriate symbologies used in the strat column
o
Other Strat Column Components (i.e., subunit thickness, cumulative
5
thickness, subunit names, formation name, series, grain-size scale)
o
Draftsmanship
10
ERTH 620 — Field Methods — Spring 2017
Grading Rubric for Emigrant Pass Project
Stratigraphic Framework for the Carrara Formation of Emigrant Pass
Delineate the Carrara Formation into three informal members; the lower, middle, and upper. Contacts will lie
between 1) upper limestone and upper shale shale. 2) middle limestone and middle (maroon) shale, and 3) lower
limestone and lower shale. Map the maroon marker unit of middle shale throughout map area
Color Scheme for the Map and Cross-Section of Emigrant Pass
Qya- Youngest Alluvial Unit
Yellow with stipples
Qia- Intermediate Alluvial Unit
Yellow
Qoa- Oldest Alluvial Unit
Dark yellow (Ocher)
Tmc- Conglomerate of Emigrant
Pass
Sea green or mint green
Cbk- Bonanza King Formation
Light-med gray
upper limestone/shale
Peach
middle limestone/shale
lower limesone/shale
Tannish Brown
(with maroon for maroon shale
marker unit)
Light umber (med. brown)
Barrel Cactus member
Pink Quartzite member
Upper member
Middle sandstone member
Violet
Pink
Sienna brown
Dark brown
Cc- Carrara Formation
Cz – Zabriske Quartzite
Cwc- Wood Canyon Fm
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