Evidence for the Latest-Miocene to Pliocene Transition from Basin-Range Tectonic to Post-Tectonic Landscape Evolution in Southeastern Arizona
Geomorphic, stratigraphic, paleomagnetic, and pedologic data reveal that: (a) the principal phase of the Basin and Range disturbance, sensu strictu, terminated within a latest Miocene to early Pliocene interval (~6 to 3 m.y.B.P) in two basins near Tucson; and (b) general tectonic quiescence has continued in these basins to the present. Approximately correlative relationships in adjacent basins suggest a similarly timed waning of large-scale Basin-Range tectonism throughout most of southeastern Arizona.
Menges, C.M. and McFadden, L.D., 1981, Evidence for the latest-Miocene to Pliocene transition from Basin-Range tectonic to post-tectonic landscape evolution in southeastern Arizona: Arizona Geological Society Digest, v. 13, p. 151-160.
Email Address Created for Land Exchange Questions
The Southwestern Region Office of Lands and Minerals Management is overseeing and administering the land exchange and appraisal process which includes the 2,422-acre Oak Flat Federal Parcel. All questions about the land exchange and appraisal process should be emailed to SM.FS.firstname.lastname@example.org
Programmatic Agreement Info
To comply with Section 106 of the National Historic Preservation Act, the Tonto National Forest developed a Programmatic Agreement (PA) and included it in Volume 5, Appendix O of the final EIS. The PA was created in cooperation with the Advisory Council on Historic Preservation, the State Historic Preservation Office, tribes and other consulting parties. The PA contains an agreed upon process for identifying, evaluating and addressing adverse effects to historic properties associated with this undertaking.
To review Volume 5 and the PA, Download Vol 5 PDF, 27 MB.