Bedrock Geologic Map of the Central Wilder Lake Intrusion, Lake County, Minnesota

Abstract

This study was done in an attempt more accurately define lithologic boundaries in the central area of the wilder lake intrusion. Data from a 2012 PRC capstone project, Adam Leu’s masters thesis, and previous mapping projects were used to map the western and eastern margins of the intrusion, leaving the middle section mostly inferred. The upper map shows the entirety of the wilder lake intrusion at a 1 to 24,000 scale and the lower map shows the area of interest at a 1 to10,000 scale. John Smith and Adam Leu spent five days camping on the edge of South WIlder Lake, traversing through areas with little to no lithologic data. Since the pagami creek burn had cleared out most of the the vegetation, the primary obsticals were dead fall and marshes. 160 outrops were mapped, but since the main goal was to better define lithologic boundaries, many outcrops that didn’t relate to a change in rock type were not put on the map.