Where in New Mexico may one see good examples* of horsts, grabens, and tilted fault- block mountains? Horsts (uplifted bedrock with normal faults on opposite sides dipping away from the uplift) Wind Mesa (faulted volcanic edifice) Google Earth coordinates: 34o 55’ 41” N, 106o50’22” W, 25,580 ft eye altitude Cibola Spring (gray, triangular horst area) Google Earth coordinates: 33o 53’ 13” N, 106o44’27” W, 27,202 ft eye altitude Carthage (small horst area, brown and tan bedrock) Google Earth coordinates: 33o 53’ 13” N, 106o44’27” W, 10,693 ft eye altitude Grabens (low areas dropped down along normal faults on opposite sides dipping inward beneath the graben) Albuquerque Basin (down-dropped basin center with uplifted margins; actually complicated in subsurface—See Albuquerque map and cross sections by Sean Connell, Bureau Map GM-78) Google Earth coordinates (centered on Belen): 34o 40’ 2” N, 106o44’32” high eye altitude Northern Tularosa Basin (down-dropped basin center with uplifted margins; actually complicated in subsurface) Google Earth coordinates: 33o 09’ 53” N, 106o20’25” W high eye altitude Winston Graben Google Earth coordinates: 33o 28’ 10” N, 107o41’13” W, 12.16 mi eye altitude Mangas Basin Google Earth coordinates: 33o 2’ 14” N, 108o38’6” W, 16.44 mi eye altitude Santa Ana Mesa (small graben area) Google Earth coordinates: 35o 26’ 41” N, 106o33’18” W, 18,056 ft eye altitude Wind Mesa (faulted volcanic edifice) Google Earth coordinates: 34o 55’ 04” N, 106o49’48” W, 25,580 ft eye altitude Carthage (small graben area in brown and tan bedrock) Google Earth coordinates: 33o 53’ 14” N, 106o44’30 W, 10,693 ft eye altitude West of Cibola Spring (small graben area—red fill surrounded by gray bedrock) Google Earth coordinates: 34o 13’ 53” N, 106o40’59” W, 8,566 ft eye altitude Tilted Fault-Block Mountains A. Rift-margin uplifts Sandia Mountains Google Earth coordinates: 35o 11’ 36” N, 106o26’02” W, high eye altitude Manzano Mountains Google Earth coordinates: 34o 46’ 49” N, 106o24’47” W, high eye altitude Oscura Mountains Google Earth coordinates: 33o 45’ 07” N, 106o22’22” W, 21.74 mi eye altitude Sacramento Mountains Google Earth coordinates: 32o 47’ 17” N, 105o49’14” W, 85 mi eye altitude B. Tilted blocks within the Rio Grande rift Lemitar Mountains Google Earth coordinates: 34o 10’ 53” N, 106o59’47” W, 13.06 mi eye altitude Chupadera Mountains Google Earth coordinates: 33o 50’ 50” N, 106o57’00” W, 16.16 mi eye altitude Fra Cristobal Mountains Google Earth coordinates: 33o 24’ 20” N, 107o06’26” W, 22.87 mi ft eye altitude Mud Springs Mountains Google Earth coordinates: 33o 09’ 23” N, 107o18’33” W, 40,595 ft eye altitude Caballo Mountains Google Earth coordinates: 32o 57’ 48” N, 107o13’51” W, 27.74 mi eye altitude Organ Mountains Google Earth coordinates: 32o 20’ 45” N, 106o33’44” W, 27.74 mi eye altitude San Andres Mountains Google Earth coordinates: 32o 40’ 34” N, 106o32’15” W, 103.7 mi eye altitude *Even good examples become complex when examined in detail. Quibble with your local geologists about the details. .