Publications
Laboratory related Publications are listed below.
Filter Total Items: 73
Using luminescence dating of coarse matrix material to estimate the slip rate of the Astaneh fault, Iran Using luminescence dating of coarse matrix material to estimate the slip rate of the Astaneh fault, Iran
In this paper, we present optically and infrared stimulated luminescence (OSL and IRSL) ages for four samples from alluvial fan surfaces in the Astaneh Valley. This valley is located in the north-east part of the Alborz range in Iran. Our morphologic interpretations recognize at least three generations of fans in the study area, all of which have been displaced along the left-lateral...
Authors
M. Rizza, Shannon A. Mahan, J.-F. Ritz, H. Nazari, J. Hollingsworth, R. Salamati
Barrier island response to late Holocene climate events, North Carolina, USA Barrier island response to late Holocene climate events, North Carolina, USA
The Outer Banks barrier islands of North Carolina, USA, contain a geologic record of inlet activity that extends from ca. 2200 cal yr BP to the present, and can be used as a proxy for storm activity. Optically stimulated luminescence (OSL) dating (26 samples) of inlet-fill and flood tide delta deposits, recognized in cores and geophysical data, provides the basis for understanding the...
Authors
D. J. Mallinson, C. W. Smith, S. Mahan, S.J. Culver, K. McDowell
Holocene landscape response to seasonality of storms in the Mojave Desert Holocene landscape response to seasonality of storms in the Mojave Desert
New optically stimulated and radiocarbon ages for alluvial fan and lake deposits in the Mojave Desert are presented, which greatly improves the temporal resolution of surface processes. The new Mojave Desert climate-landscape record is particularly detailed for the late Holocene. Evidence from ephemeral lake deposits and landforms indicates times of sustained stream flow during a wet...
Authors
D. M. Miller, K. M. Schmidt, S. A. Mahan, J. P. McGeehin, L.A. Owen, J.A. Barron, F. Lehmkuhl, R. Lohrer
Moderate rates of late Quaternary slip along the northwestern margin of the Basin and Range Province, Surprise Valley fault, northeastern California Moderate rates of late Quaternary slip along the northwestern margin of the Basin and Range Province, Surprise Valley fault, northeastern California
The 86-km-long Surprise Valley normal fault forms part of the active northwestern margin of the Basin and Range province in northeastern California. We use trench mapping and radiocarbon, luminescence, and tephra dating to estimate displacements and timing of the past five surface-rupturing earthquakes on the central part of the fault near Cedarville. A Bayesian OxCal analysis of timing
Authors
Stephen F. Personius, Anthony J. Crone, Michael N. Machette, Shannon Mahan, David J. Lidke
Sediment storage and transport in Pancho Rico Valley during and after the Pleistocene-Holocene transition, Coast Ranges of central California (Monterey County) Sediment storage and transport in Pancho Rico Valley during and after the Pleistocene-Holocene transition, Coast Ranges of central California (Monterey County)
Factors influencing sediment transport and storage within the 156??6 km2 drainage basin of Pancho Rico Creek (PRC), and sediment transport from the PRC drainage basin to its c. 11000 km2 mainstem drainage (Salinas River) are investigated. Numeric age estimates are determined by optically stimulated luminescence (OSL) dating on quartz grains from three sediment samples collected from a...
Authors
A.F. Garcia, S. A. Mahan
Use of OSL dating to establish the stratigraphic framework of Quaternary eolian sediments, Anton scarp upper trench, Northeastern Colorado High Plains, USA Use of OSL dating to establish the stratigraphic framework of Quaternary eolian sediments, Anton scarp upper trench, Northeastern Colorado High Plains, USA
This paper contains the results of the optically stimulated luminescence (OSL) dating used to establish stratigraphic ages and relationships of eolian sediments in a trench in northeastern Colorado, USA. This trench was located in the upper face of the Anton scarp, a major topographic lineament trending NW-SE for a distance of 135 km, in anticipation of intersecting near-surface faulting...
Authors
S. A. Mahan, D.C. Noe, J.P. McCalpin
Late Pleistocene paleohydrology near the boundary of the Sonoran and Chihuahuan Deserts, southeastern Arizona, USA Late Pleistocene paleohydrology near the boundary of the Sonoran and Chihuahuan Deserts, southeastern Arizona, USA
Ground-water discharge (GWD) deposits form in arid environments as water tables rise and approach or breach the ground surface during periods of enhanced effective precipitation. Where preserved, these deposits contain information on the timing and elevation of past ground-water fluctuations. Here we report on the investigation of a series of GWD deposits that are exposed in...
Authors
Jeffery S. Pigati, Jordon E. Bright, Timothy M. Shanahan, Shannon Mahan
Late pleistocene aggradation and degradation of the lower colorado river: Perspectives from the Cottonwood area and other reconnaissance below Boulder Canyon Late pleistocene aggradation and degradation of the lower colorado river: Perspectives from the Cottonwood area and other reconnaissance below Boulder Canyon
Where the lower Colorado River traverses the Basin and Range Province below the Grand Canyon, significant late Pleistocene aggradation and subsequent degrada tion of the river are indicated by luminescence, paleomagnetic, and U-series data and stratigraphy. Aggradational, finely bedded reddish mud, clay, and silt are underlain and overlain by cross-bedded to plane-bedded fine sand and...
Authors
S.C. Lundstrom, S. A. Mahan, J.B. Paces, M.R. Hudson, P.K. House, D.V. Malmon, J. L. Blair, K. A. Howard
Optically stimulated luminescence age controls on late Pleistocene and Holocene coastal lithosomes, North Carolina, USA Optically stimulated luminescence age controls on late Pleistocene and Holocene coastal lithosomes, North Carolina, USA
Luminescence ages from a variety of coastal features on the North Carolina Coastal Plain provide age control for shoreline formation and relative sea-level position during the late Pleistocene. A series of paleoshoreline ridges, dating to Marine Isotope Stage (MIS) 5a and MIS 3 have been defined. The Kitty Hawk beach ridges, on the modern Outer Banks, yield ages of 3 to 2??ka. Oxygen...
Authors
D. Mallinson, K. Burdette, S. Mahan, G. Brook
A 3-Dimensional Model of Water-Bearing Sequences in the Dominguez Gap Region, Long Beach, California A 3-Dimensional Model of Water-Bearing Sequences in the Dominguez Gap Region, Long Beach, California
A 3-dimensional computer model of the Quaternary sequence stratigraphy in the Dominguez gap region of Long Beach, California has been developed to provide a robust chronostratigraphic framework for hydrologic and tectonic studies. The model consists of 13 layers within a 16.5 by 16.1 km (10.25 by 10 mile) square area and extends downward to an altitude of -900 meters (-2952.76 feet). Ten...
Authors
Daniel J. Ponti, Kenneth D. Ehman, Brian D. Edwards, John C. Tinsley, Thomas Hildenbrand, John W. Hillhouse, Randall T. Hanson, Kristen McDougall, Charles L. Powell, Elmira Wan, Michael Land, Shannon Mahan, Andrei M. Sarna-Wojcicki
Ages of Quaternary Rio Grande terrace-fill deposits, Albuquerque area, New Mexico Ages of Quaternary Rio Grande terrace-fill deposits, Albuquerque area, New Mexico
Results from luminescence dating on 13 samples from the Albuquerque area show that major-drainage fluvial deposits represent significant periods of aggradation that formed paired, correlatable terraces on the east and west margins of the Rio Grande valley . The youngest terrace fills (Primero Alto) formed during late Pleistocene as a result of streamflow variations with climate cooling...
Authors
Shannon Mahan, Byron D. Stone, Ralph R. Shroba
Paleoecology reconstruction from trapped gases in a fulgurite from the late Pleistocene of the Libyan Desert Paleoecology reconstruction from trapped gases in a fulgurite from the late Pleistocene of the Libyan Desert
When lightning strikes the ground, it heats, melts, and fuses the sand in soils to form glass tubes known as fulgurites. We report here the composition of CO2, CO, and NO contained within the glassy bubbles of a fulgurite from the Libyan Desert. The results show that the fulgurite formed when the ground contained 0.1 wt% organic carbon with a C/N ratio of 10-15 and a ??13C of -13.96
Authors
Gonzalez R. Navarro, S. A. Mahan, A.K. Singhvi, R. Navarro-Aceves, J.-L. Rajot, C.P. McKay, P. Coll, F. Raulin