USDA Natural Resources Conservation Service
The Twelve Soil Orders - from the University of Idaho's College of Agriculture and Life Sciences
Dirtland at the Microbe Zoo
Soil Biological Communities - and educational page from the BLM
Soil Science Society of America
the USGS bedform sedimentology site
pictures of Sedimentary Structures from the University of British Columbia
the on-line version of the "Classic" Petrology of Sedimentary Rocks by geogod R.L. Folk; from THE University (UT Austin)