Documents

This paper compares a number of approximations used to estimate means and variances of continuous random variables and/ or to serve as substitutes for the probability distributions of such variables, with particular emphasis on three-point approximations.

We present tectonic reconstructions and an accompanying animation of deformation across the North America–Pacific plate boundary since 36 Ma.

The Frazier Mountain paleoseismic site is located on a poorly understood section of the southern San Andreas fault, mid-way between the well-known Carrizo Plain and Mojave sites of Bidart Fan and Pallett Creek. Emerging paleoseismic evidence indicates that earthquakes along this stretch repeat at a similar pace, with an average interval of - 122 years between AD. 1000 and 1857.

Lake Roberts Dam is located in Grant County in southwestern New Mexico. Tectonically the damsite is within the Southern Basin and Range Province and the Rio Grande rift as defined by Machette (1998). Although the historical seismicity in the region has been low, the site has undoubtedly been shaken by past large prehistoric earthquakes caused by active regional faults and in historical times, as recently as 1887 (Figures 2 to 4).

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.

This catalog has been prepared to summarize available information for selected springs and seeps in the Upper Queen Creek and Devils Canyon watersheds. The springs and seeps included in this catalog were selected based on proximity to planned facilities as proposed by Resolution Copper for the Resolution mine project. Version 1.0.

Surveys were conducted for special-status plant species associated with water features that occur in the vicinity of the Study Area.

A commonality is that ecological restoration is challenging in deserts, because deserts represent extremes of Earth’s climates and precipitation is unreliable. It is not uncommon for some deserts to receive little or no rainfall for an entire year, or even multiple years.

An audit of the accompanying financial statements of the governmental activities, each major fund, and aggregate remaining fund information of Graham County as of and for the year ended June 30, 2016, and the related notes to the financial statements, which collectively comprise the County’s basic financial statements as listed in the table of contents.

Map of Arizona geologic hazards