VIRTUAL FIELD TRIP # 2

Structure, Stratigraphy, and Sedimentology of Paleozoic Rocks,
Southeastern Ouachita Mountains, Arkansas

Lafayette Geological Society Field Trip
March 19, 20, 21, 1999

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Click on photo for better view.
BARRY WAWAK, field trip leader and guidebook author, reads the rocks at Murphy Creek.
Our virtual fieldtrip is based upon Barry's guidebook,
"Geology of the Southeastern Ouachita Mountains: Lafayette Geological Society Field Trip, March 19-21, 1999".


The route of the field trip runs from Arkadelphia to Hot Springs (Day One),
then Hot Springs to Mt. Ida to Arkadelphia (Day Two).

Day One Highlights:
  1. DeGray Spillway--Brian Lock leads inspection of deep-water turbidites in the Pennsylvanian Jackfork Formation.
  2. Old Quarry, Malvern--unconformity, novaculite
  3. Mid State Quarry--a lamprophyre dike, Stanley Shale
  4. Stratcor Vanadium Mine at Wilson Springs--igneous intrusion, lamprophyre dikes and carbonatite
  5. Diamond Jo Quarry--outer edge of Magnet Cove igneous intrusion
Day Two Highlights:
  1. Ordovician: Mazarn Shale (L. Ord.); Blakely SS and Womble Shale (U. Ord.)--Charlton Recreation Area (Murphy Creek and U.S. 270 Roadcut)
  2. Ordovician Crystal Mountain SS--Highway 270 Roadcut
  3. Mississippian Stanley Shale --McLeod Exit, M.L.K. Freeway
  4. Caddo Gap--Arkansas Novaculite (Devonian and Mississippian)


Courtesy of Rockhounding Arkansas
Physiographic Regions of Arkansas Today


Courtesy of Rockhounding Arkansas
Highway Map of Arkansas


De Gray Dam Spillway section
from Brian E. Lock, 1978 SACGS guidebook
(click on drawing for enlarged view)


Special thanks go to
BARRY WAWAK, BRIAN LOCK, and FRANCIS BROUSSARD
for the use of their excellent fieldtrip photographs.

LINKS:

 
 
Web Author: Karen W. Broussard