Oblique aerial photographs of Montauk, New York

Oblique aerial photographs of Montauk, New York. View looking north along the Long Island shore. Long-term erosion of the glacial sediments has exposed a paleochannel, or ancient riverbed, in the cliff. Above the unconformity (green arrow) sediment layers are oriented near horizontal, following the curve of the ancient riverbed. While the sediment layers below the unconformity are difficult to see, the different pattern of erosion highlights the change in sediment cohesiveness. Additionally, minor erosion can be seen at the base of the cliff, possibly from larger waves generated by Hurricane Joaquin. The yellow arrow in each image points to the same feature.