Page 312 - Laboratory Manual in Physical Geology

A CTIVIT Y 10.8 Appalachian Mountains Geologic Map

Name: ______________________________________ Course/Section: ______________________ Date: ___________

Directions: A. Complete the geologic cross section using the steps in FIGURE 10.6 . B. Label the kind(s) of geologic structure(s) revealed

by your work. Then add the appropriate symbols from FIGURE 10.5 to the geologic map to show the axes of the folds. C. Add half-

arrows to the fault near the center of the geologic map to show the relative motions of its two sides. Exactly what kind of fault is it?
Bloomsburg Formation Sb St
Sb
(shale) X 35
Silurian Sc Clinton Group Sc
(shale)
Sc
Tuscarora Formation
St
(sandstone) Oss
Bald Eagle and Juniata
Oss
Formations (sandstones)
Ordovician Osh Formations (shales) 50
Martinsburg and Reedsville
Coburn Formation
Oc
(limestone and shale)
40
Middle Ordovician
Ols
limestones

Osh
Y

St
70

Oc
Osh
Ols

Oss Oc

GEOLOGIC MAP
Portions of McConnellsburg and St. Thomas
Ols Quadrangles, Valley and Ridge Province, South-central
PA. Adapted from PA Topographic and Geologic
Survey, Geologic Map of Pennsylvania
Osh
0 1 km 0 1 mile

X Y
4000 ft 4000 ft

2000 ft 2000 ft

Sea level 0 Sea level 0

–2000 ft –2000 ft

–4000 ft GEOLOGIC CROSS SECTION –4000 ft
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