After browsing several of the fascinating offerings, my love of lichens took me to Botany for Geologists where David at History of Geology does a great job of explaining lichenometry, or the use of lichens to date exposed rock surfaces.
In his sidebar, I discovered Eat.Sleep.Geology., by a neogeoblogger whose nom de plume is GeoGirl. She soon led me to the geologists' blog carnival over at The Accretionary Wedge, which provided great ideas for future Berries as well as a long list of future reading.
Geology class at a local outcrop.
David also tipped me off to Riparian Rap, whose series on geomorphically incorrect art is mind-bending entertainment.
As always in the blog world, you can make your way around the planet and back again in a few clicks, and learn a lot about how it's put together in the process.