CONTENTS

FIGURES

1. Geologic map and cross sections of the BR-SMA
2. Index map of the study area showing the trace of the Short Hill fault and a composite of previously mapped segments of the fault
3. Maps showing geology, faults and folds, and dominant foliation and lineation orientations.
4. Equal-area projections of poles to foliation in the footwall and hanging wall blocks of the Short Hill fault
5. Photographs and illustrations of A cleavage, B phyllonitic foliation, C F2 folds, and D slickenlines
6. Equal-area projections of lineations (L) and fold axes
7. Schematic cross section of folds and foliations of the BR-SMA
8. Geologic map and cross section of the central region
9. Geologic map of the Hillsboro syncline and equal area projections
10. Geologic map of the Weverton core site
11. Structures in the Weverton core
12. Photomicrographs of the SHF .
13. Geologic map, cross section, and aeromagnetic image of the southern region
14. Geologic map of the Purcellville cores.
15. Geologic map and cross section of the northern region
16. Geologic maps and cross section of the Elk Ridge core and Rohersville core sites
17. Photographs of the SHF along Millbrook Creek
18. Photographs of the SHF
19. Photographs of A folds and B cleavage
20. Stratigraphic separation diagrams
21. Summary structural map of the SHF
22. Side-looking airborne radar image of the northern and ground-based photographs
23. Composite cross section and schematic illustration of the SHF
24. Map-view of the sequence of deformation
25. Structural map of the SHF
26. Index map of the BR-SMA showing analogous faults
27. Geologic map and cross sections of the BR-SMA
28. Block diagram and schematic cross sections
29. Tectonic map and schematic restored cross section

TABLES

1. Geochronology and tectonic history of the BR-SMA, northern Virginia and southern Maryland
2. Types and distinctive features of foliations and lineations along the Short Hill fault
3. Relative chronology of deformation events, foliations, and lineations along the Short Hill fault

U.S. Department of the Interior, U.S. Geological Survey
URL: http:// pubs.usgs.gov /bul/b2136/contents.html
For more information, contact Scott Southworth
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Last modified: 15:00:26 Thu 29 Sep 2005
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