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Lower Martinsburg Formation folds

View on map:38.862100°N 78.400700°W

Comments

The Lower Martinsburg Formation here consists of thin-bedded argillaceous rocks.  The outcrop is perpendicular to the general strike of the area (cross sectional view) exposing an anticlinal folds along with associated syclinal folds.  Slaty cleavage is found in the rocks.  "The Martinsburg Formation is an ~1-km thick sequence of turbiditic shale and sandstone that represents burial of the Cambrian-Orodovician carbonate shelf beneath the Taconic clastic wedge during the Middle to Late Ordovician." Stop 2-6 Whitmeyer et al.   

References

  • Page 25 - Whitmeryer, S. J., et al., 2015, A billion years of deformation in central Appalachians: Orogenic processes and products: Geol. Soc. Am. Field Guide 40, p. 11-33.
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