Oligocene to Paleocene[?] sedimentary rocks (AZTso;0)

Light colored, weakly to moderately consolidated conglomerate and sandstone deposited largely or entirely before mid-Tertiary volcanism and extensional faulting. Most sediment was deposited by early Cenozoic streams that flowed northeastward onto the Colorado Plateau from areas to the southwest that are now lower in elevation than the Plateau. Sediments of this map unit, other than the Chuska Sandstone in northeasternmost Arizona, are commonly referred to as "rim gravels" because they now rest on or near the Mogollon Rim, which is the southwestern edge of the Colorado Plateau. (30-65 Ma)

State	Arizona
Name	Oligocene to Paleocene[?] sedimentary rocks
Geologic age	Paleocene(?) to Oligocene
Original map label	Tso
Primary rock type	conglomerate
Secondary rock type	sandstone
Other rock types	siltstone; limestone; mudstone; basalt
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed) Sedimentary > Clastic > Conglomerate (Bed) Incidental Igneous > Volcanic > Mafic-volcanic > Basalt (Flow) Sedimentary > Carbonate > Limestone (Bed) Sedimentary > Clastic > Mudstone (Bed) Sedimentary > Clastic > Siltstone (Bed)
Map references	Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.
Unit references	Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.
Geographic coverage	Apache - Coconino - Gila - Greenlee - Mohave - Navajo - Yavapai