Evidence for Quaternary Piracy of Pumpkin Creek, South-Central Morrill County, Nebraska

Authors

Robert F. Diffendal, University of Nebraska - LincolnFollow

Date of this Version

1984

Document Type

Article

Comments

1984. Transactions of the Nebraska Academy of Sciences, XII: 65-69. Copyright © 1984 Diffendal, Jr.

Abstract

The occurrence of Quaternary anorthosite-rich sand and gravel deposits in south-central Morrill County, Nebraska, southeast of the mouth of Pumpkin Creek and south of the North Platte River suggests that the creek formerly flowed farther east than it does today. This eastern extension of the creek was abandoned when a headward-cutting tributary of the North Platte River eroded through the divide between Pumpkin Creek and the North Platte just east of Jail and Courthouse rocks, and captured Pumpkin Creek.