The granitoid exposed here is basement rock in the Blue Ridge Complex. The rock contains PL + Kf + qtz + Bi with accessory Mu + titanite and rare garnet. Two alkali mafic dikes with steep dips intrude the granitoid. The dikes contain Bi + PL + Am + titanite + epidote + qtz. The dikes are believed to be emplaced during tensional rifting that failed during the pre-Iapetus rifting. Stop 1-1 Bailey et al.
References
Page 65 - Bailey, C. M. et al. 2017, From Laurentia to Iapetus: Traversing the Blue Ridge-Piedmont terrane boundary in central Virginia: Geol. Soc. Am. Field Guide 47, p. 59-75.
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