Today is Geologic Map Day, part of Earth Science Week here in the United States. According to the American Geosciences Institute, this day "promote(s) awareness of geologic mapping and its vital importance to society."
So, what is a geologic map? A geologic map tells you all about the rocks beneath your feet - what type of rocks and where their strata (or layers) occur, along with where you can find underground caves, faults, and other geologic features. A builder might use a geologic map to determine where it is safest to build a new structure. An environmentalist can use a geologic map to guess how pollution might travel underground. And a city planner might use an environmental map to determine where to sink a new well.
Want to check out a geologic map for where you live? If you're in the U.S., you can visit the Association of American State Geologists and click on the map for your state Additional Geologic Map Day Resources are available at AGI's Earth Science Week website.
Hugs to all of my geologist friends! You rock! ;-)