Hoskinnini No. 1 channel (Channel No. 27; paleochannel No. 27), Hoskinnini Mesa, Navajo County, Arizona, USAi

Regional Level Types
Hoskinnini No. 1 channel (Channel No. 27; paleochannel No. 27)	Channel
Hoskinnini Mesa	Mesa
Navajo County	County
Arizona	State
USA	Country

A paleochannel structure that trends N65W and is some 250 feet wide and 75 feet deep. Filled with coarse-grained, massive sandstone.

The channels (includes channel 27) crop out on the southeast edge of Hoskinnini Mesa, and are easily accessible from a graded dirt road on the mesa top. The road extends west from Navajo Indian Reservation Route 1 (Kayenta-Mexican Hat road), follows Adahchijiyahi Canyon to Todicheenie bench, crosses Todicheenie and adjacent uplands and finally ascends Hoskinnini Mesa.

Exposed consolidated sedimentary strata range from the Organ Rock tongue of the Cutler formation, along the base of Hoskinnini Mesa, to the Shinarump member of the Chinle formation, and form the mesa cap. The Shinarump member, which overlies the Moenkopi formation, form; a vertical cliff about 50 feet high, and is veneered by dune sand which ranges in thickness from a thin film to a cover more than 20 feet thick.

These strata form the asymmetrical Organ Rock anticline with its gently dipping west flank and steeply dipping east flank. The two channels crop out near the crest of the structure.

Channel 27 (Hoskinnini No. 1) strikes about N65W, is about 250 feet wide, and has been cut about 75 feet into the Moenkopi formation. Channel strata seem to be predominantly light-gray massive coarse-grained sandstone with small amounts of included silicified wood. A longitudinal section of the channel is exposed, but along much of its length the altered zone in uppermost strata of the Moenkopi formation is covered by debris or is not exposed. No uranium minerals or abnormal radioactivity were noted.