Paudash Lake is located within the Canadian Shield. During the last Ice age, glaciers scraped away a deep layer of soil, through to metamorphosed sedimentary deposits and the original Precambrian bedrock. As a result, the soil atop the Canadian Shield is typically thin, less than a deep in many cases. In addition, there is a great deal of exposed bedrock, such as the beautiful cliffs on Paudash Lake. All of the lakes in the Shield were carved out or sculpted by glaciers, and usually have the characteristically rocky shorelines, although many depressions contain deep glacial deposits in addition to water. In the case of Paudash Lake, the local bedrock is metamorphosed sedimentary rock, including limestone (now marble), which helps to neutralize acid rain .