What  is the name of  the area also known as the Ridge Valley Province where a ridgeline cut through on its East side??
Sharp Mountain Sharp Mountain or Sharp Ridge (historically also spelled 'Sharpe') in eastern central Pennsylvania in the United States is a ridgeline (fold) of the Ridge-and-Valley Appalachians cut through on its east-side in the Tamaqua gap by the Little Schuylkill River which sunders it from the eastern extension of the ridgeline, the Nesquehoning Ridge. The ridgeline, located in the heart of the Pennsylvania Anthracite Coal Region, drains to the Susquehanna along its western slopes and via the Little Schuylkill tributary of the Schuylkill River on its eastern faces.
Sawatch Uplift The Sawatch Uplift is a prominent geologic anticline in the Rocky Mountains in central Colorado in the United States. It was formed as a bulge in the North American Plate approximately 70–65 MYA during the Laramide orogeny that created the modern Rocky Mountains. The uplift runs north-south for several hundred miles from central Colorado into northern New Mexico. The Sawatch Range and Mosquito Range were both formed as part of the uplift. Approximately 35 MYA, stresses in the continental plate in the center of the uplift caused the center to collapse, forming a trough between the Sawatch and Mosquito Range that is part of the larger Rio Grande Rift. The trough runs southward from Leadville, CO into New Mexico. The northern part of the rift forms the headwater valley of the Arkansas River.