| Autor: |
Randel Tom Cox, Joseph Galluzzi, James B. Harris, Steven L. Forman, William C. Beard, Roy B. Van Arsdale |
| Rok vydání: |
2000 |
| Předmět: |
|
| Zdroj: |
Geological Society of America Bulletin. 112:1724-1735 |
| ISSN: |
0016-7606 |
| DOI: |
10.1130/0016-7606(2000)112<1724:qfitsm>2.0.co;2 |
| Popis: |
The recently recognized Saline River fault zone in the southwestern Mississippi embayment (strike = 135°) is characterized by moderate historic seismicity. We document paleoseismicity (possibly strong) on the Saline River fault zone that is outside the known region of neotectonism in the northern embayment. Six surface faults were excavated within the Saline River fault zone, and all faults displace marine Eocene units and fluvial Pliocene–Pleistocene units; five show post-Wisconsin loess movement (thermoluminescence [TL] age = 23.6 ± 3 ka), and three deform middle to late Holocene eolian silt (TL age = 5.1 ± 0.6 ka and 3.6 ± 0.5 ka) as fault-tip flexures. Along the principal excavated fault, fault-plane braiding and plunging drag folding suggest a strong component of left slip, and subsidiary faults show both normal and reverse displacement ( |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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