Late Quaternary alluvial history of the middle Owl Creek drainage basin in central Texas: A record of geomorphic response to environmental change

Meier, Holly A.; Nordt, Lee C.; Forman, Steven L.; Driese, Steven G.

doi:10.1016/j.quaint.2013.07.010

Cited by 19 publications

(21 citation statements)

References 67 publications

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“…The development of single-aliquot regeneration (SAR) protocols provides improved accuracy and precision for dating the burial time of quartz grains (e.g., Murray and Wintle, 2003;Wintle and Murray, 2006), particularly in fluvial environments, although there are concerns about full solar resetting in higher-energy depositional settings (cf. Rittenour, 2008; Meier et al, 2013;Forman, 2015). SAR protocols (Wintle and Murray, 2006) were used in this study to estimate the apparent equivalent dose of the 63-100 µm, 100-150 µm, 250-355 µm, or 355-425 µm quartz fraction for up to 60 separate aliquots.…”

Section: Optically Stimulated Luminescence (Osl) Datingmentioning

confidence: 99%

Relating the long-term and short-term vertical deformation across a transect of the forearc in the central Mexican subduction zone

et al. 2018

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Earthquake-cycle deformation, which includes earthquake ruptures, interseismic strain, and transient slow slip events, spans spatial scales ranging from fractions of a meter to thousands of kilometers. Similarly, temporal scales range from seconds during an earthquake rupture to thousands of years of strain accumulation between earthquakes. We discuss results regarding the vertical crustal deformation associated with both slow and rapid crustal defor ma tion across a transect of the central Mexican subduction forearc in the Guerrero seismic gap, where the Cocos plate underthrusts the North America plate. This sector of the subduction zone is characterized by a flat-slab geometry with zones of sharp bending-unbending of the slab, irregularly distributed seismicity, and exceptionally large slow slip events. We used the river network, topography, geomorphic features, and morphometry on a transect across the forearc to assess Quaternary crustal deformation. The Papagayo drainage network shows that the forearc has been uplifted since the late Ceno zoic (~25 Ma), and that rates of uplift increased since the beginning of the Holocene. Uplift is not homogeneous but shows a trend of increase away from the coast. This vertical deformation is strongly influenced by subduction processes. Thus, the Papagayo River network is strongly controlled by Holocene earthquake cycle processes. This is particularly true for the southern section of the drainage basin, where E-W-striking left-lateral strike-slip faults with a vertical component offset the course of the main river. These faults are accommodating part of the oblique plate convergence at the Mexican subduction zone. We measured the height of a series of terraces and dated quartz extracts by optically stimulated luminescence, and we calculated long-term rates of uplift ranging from 0.5 to 4.9 mm/yr. We discuss associations of forearc topography, faults, and long-term crustal deformation with the Cocos slab geometry, distribution of slow slip events, and earthquake-cycle deformation.

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Section: Optically Stimulated Luminescence (Osl) Datingmentioning

confidence: 99%

Relating the long-term and short-term vertical deformation across a transect of the forearc in the central Mexican subduction zone

et al. 2018

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“…A zero overdispersion percentage indicates high internal consistency in D e values with 95% of the D e values within 2s errors. Overdispersion values 20% are routinely assessed for small aliquots of quartz grains that are well solar reset, like eolian sands (e.g., Olley et al, 1998;Wright et al, 2011Meier et al, 2013 and this value is considered a conservative threshold metric for calculation of a D e value using the central age model (CAM) of Galbraith et al (1999). We consider overdispersion values >20% (at one sigma limits) to indicate post depositional mixing of grains, grains of various ages, partial solar resetting of grains or complex microdosimetry; the Finite Mixture Model (FMM) is an appropriate statistical treatment for such data (Galbraith and Green, 1990), and this model was used for quartz extracts that yielded overdispersion values of !25% (Table 2).…”

Section: Optically Stimulated Luminescence Datingmentioning

confidence: 99%

Eolian depositional phases during the past 50 ka and inferred climate variability for the Pampean Sand Sea, western Pampas, Argentina

Tripaldi

Forman

2016

Quaternary Science Reviews

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“…Aliquots were removed from analysis because the fast ratio was <20 (Durcan and Duller, 2011), the recycling ratio was not between 0.90 and 1.10, the zero dose was >5% of (Murray and Wintle, 2003 Figure 4). Overdispersion values ≤20% are routinely assessed for small aliquots of quartz grains that are well solar reset, like far-traveled eolian and fluvial sands (e.g., Olley et al, 1998;Wright et al, 2011;Meier et al, 2013) and this value is considered a threshold metric for calculation of a D e value using the central age model of Galbraith et al (1999). Overdispersion values >20% may indicate mixing of grains of various ages or partial solar resetting of grains; the minimum age (three parameters) (Galbraith et al, 1999) and finite mixture models is an appropriate statistical treatment for such data (Galbraith and Green, 1990), and these models are used to calculate optical ages (Figure 4; Table 1).…”

Section: Methods: Optical Datingmentioning

confidence: 99%

Episodic eolian sand deposition in the past 4000 years in Cape Cod National Seashore, Massachusetts, USA in response to possible hurricane/storm and anthropogenic disturbances

Forman

2015

Front. Earth Sci.

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The eolian sand depositional record for a dune field within Cape Cod National Seashore, Massachusetts is posit as a sensitive indicator of environmental disturbances in the late Holocene from a combination of factors such as hurricane/storm and forest fire occurrence, and anthropogenic activity. Stratigraphic and sedimentologic observations, particularly the burial of Spodosol-like soils, and associated 14 C and OSL ages that are concordant indicate at least six eolian depositional events at ca. 3750, 2500, 1800, 960, 430, and <250 years ago. The two oldest events are documented at just one locality and thus, the pervasiveness of this eolian activity is unknown. However, the four younger events are identified in three or more sites and show evidence for dune migration and sand sheet accretion. The timing of eolian deposition, particularly the initiation age, corresponds to documented periods of increased storminess/hurricane activity in the North Atlantic Ocean at ca. 2.0-1.6, and 1.0 ka and also a wetter coastal climate, which suppressed the occurrence of forest fire. Thus, local droughts are not associated with periods of dune movement in this mesic environment. Latest eolian activity on outer Cape Cod commenced in the past 300-500 years and may reflect multiple factors including broad-scale landscape disturbance with European colonization, an increased incidence of forest fires and heightened storminess. Eolian systems of Cape Cod appear to be sensitive to landscape disturbance and prior to European settlement may reflect predominantly hurricane/storm disturbance, despite generally mesic conditions in past 4 ka.

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Late Quaternary alluvial history of the middle Owl Creek drainage basin in central Texas: A record of geomorphic response to environmental change

Cited by 19 publications

References 67 publications

Relating the long-term and short-term vertical deformation across a transect of the forearc in the central Mexican subduction zone

Relating the long-term and short-term vertical deformation across a transect of the forearc in the central Mexican subduction zone

Eolian depositional phases during the past 50 ka and inferred climate variability for the Pampean Sand Sea, western Pampas, Argentina

Episodic eolian sand deposition in the past 4000 years in Cape Cod National Seashore, Massachusetts, USA in response to possible hurricane/storm and anthropogenic disturbances

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