Reference: Chamberlin, Richard (2012) Classroom Activity: Using Block Models to Illustrate Crustal Extension in the Rio Grande Rift. Lite Geology Spring, New Mexico Bureau of Geology & Mineral Resources. Issue 31, p. 11-13. (https://geoinfo.nmt.edu/publications/periodicals/litegeology/31/lg_v31.pdf).
Reference: Chamberlin, Richard (2012) Classroom Activity: Using Block Models to Illustrate Crustal Extension in the Rio Grande Rift. Lite Geology Spring, New Mexico Bureau of Geology & Mineral Resources. Issue 31, p. 11-13. (https://geoinfo.nmt.edu/publications/periodicals/litegeology/31/lg_v31.pdf).