THE CHERRY FAULT               

                                                                         

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                        The folded conglomerates and mudstones of the Gable Creek and Hudspeth Formations, together with the Narrows Fault and the axis of the Mitchell Anticline have all been displaced 3.5 miles by the east-west trending, right-lateral, strike-slip Cherry Fault, named in honor of Mr. Fran Cherry who for many years granted me and my geology students unrestricted access to his extensive ranch lands.   Where the Cherry Fault crosses narrow valleys, the surface of the fault is well exposed, displays horizontal striations, and its map expression presents a zig-zag pattern because the fault dips south 80 degrees.

 

Trace of Cherry Fault

            I first recognized the fault in 1991, while viewing from Ore-207, that strata were dipping in opposite directions on the north and south sides of an east-west canyon.   More detailed exploration revealed that this fault displaces the Cretaceous strata, the Narrows Fault, and most of the folded Clarno Formation but at east and west exposures it is overlain by less disturbed late Clarno lava flows.   These relationships supply additional evidence that during late-stage development of the Mitchell Anticline, Clarno units were subjected to additional folding in limited regions.  (See the presentation devoted to description of the Mitchell Anticline.)  It should be recognized that although the Cherry Fault has been selected here as an obvious demonstration of multiple episodes of deformation, there are many other parallel faults of lesser displacement exposed in the Cretaceous Inlier that illustrate similar relationships.   

 

Geo map of Cherry Fault

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