BEDROCK GEOLOGIC MAPS OF THE LITTLETON AND HOLLISTER 7.5-MINUTE QUADRANGLES, NORTH CAROLINA: PROGRESS IN THE NCGS EASTERN PIEDMONT STATEMAP PROGRAM
The Littleton and Hollister quads contain metamorphic rocks of the infrastructural Raleigh terrane in the northwest, in contact to the east, along the Macon fault, with metamorphic rocks of the suprastructural Spring Hope terrane. The Hollister fault separates the Spring Hope terrane from the infrastructural Triplet terrane exposed to the east of the two quads. The eastern half of both quads is dominated by late Paleozoic granitoid rocks that belong to six separate plutons. Some of these granitic rocks are strongly affected by deformation associated with the Macon and Hollister faults; others appear to be post-kinematic. A swarm of 200-Ma rhyolite porphyry dikes transects the older rocks of the quads, as do diabase dikes of similar age.
Over the next several years, we hope to continue mapping in the Henderson sheet and the western Roanoke Rapids sheet, working cooperatively where possible to take advantage of existing mapping.