2008-08-25 20:45 Billwhittaker 3260×2287× (1870658 bytes) {{Information |Description=Geologic Bedrock Map of Iowa, created in ArcView 3.3 using ISU, USGS, and Iowa DNR datasets. |Source=I created this work entirely by myself. |Date=2008 |Author=~~~ |other_versions= }}
2008-08-25 13:13 Billwhittaker 3292×2195× (1475527 bytes) {{Information |Description= |Source=I created this work entirely by myself. |Date= |Author=~~~ |other_versions= }}
2008-08-25 13:07 Billwhittaker 3562×3281× (776575 bytes) {{Information |Description=Bedrock Formations of Iowa |Source=I created this work entirely by myself. |Date=2008 |Author=~~~ |other_versions= }}