價格：免費
檔案大小：44 MB
版本需求：需要 iOS 9.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Tap anywhere on the map within Minnesota to get information about the soil, glacial geology, depth of the bedrock below the land's surface, and the types and ages of the bedrock in that location. Press the 'below me now' button to instantly get the above information about your current GPS determined location.
支援平台：iPhone, iPad