Pedogenic carbonate stable isotope record of environmental change during the Neogene in the southern Great Plains, southwest Kansas, USA: Oxygen isotopes and paleoclimate during the evolution of C4-dominated grasslands

Fox, David L.; Honey, James G.; Martin, Robert A.; Peláez‐Campomanes, Pablo

doi:10.1130/b30402.1

Cited by 33 publications

(19 citation statements)

References 49 publications

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“…Soil water at depths of greater than 50 cm is a mix of meteoric water, infiltrating shallow soil water, and antecedent water from deep‐water recharge (Mathieu & Bariac, ; Gazis & Feng, ; Fox et al ., ). The δ 18 O values of pedogenic carbonate hence primarily depend on soil temperature and the soil water δ 18 O values, and may reflect cooler/wetter and warmer/drier conditions (Fox et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Late Oligocene to early Miocene humidity change recorded in terrestrial sequences in the Ili Basin (south‐eastern Kazakhstan, Central Asia)

et al. 2017

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Enhanced aridification of Central Asia driven by the combined effects of orogenic surface uplift, Paratethys retreat, changes in atmospheric moisture transport and global cooling is one of the most prominent Cenozoic climate change events of the Northern Hemisphere. Deciphering regional long‐term patterns of Central Asian hydrology is, therefore, a key element in understanding the role of Northern Hemisphere mid‐latitude drying in the global hydrological system. This study characterizes long‐term palaeoenvironmental conditions between the late Oligocene and early Miocene in south‐eastern Kazakhstan based on stable isotopes, elemental geochemistry and laser ablation uranium–lead geochronology from alluvial, fluvial and pedogenic deposits. Sedimentary facies and geochemical weathering indices suggest an increased surface and groundwater discharge fed by orographically enhanced precipitation in the Tien Shan hinterland. In contrast, pedogenic stable isotope data and elevated rates of magnesium fixation in clay minerals mirror enhanced rates of evaporation in the vadose zone due to protracted aridification. This study posits that pronounced surface uplift of the Tien Shan Mountains during the Oligocene–Miocene transition promoted regionally increased orographic precipitation and the development of fluvial discharge systems.

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Section: Discussionmentioning

confidence: 99%

Late Oligocene to early Miocene humidity change recorded in terrestrial sequences in the Ili Basin (south‐eastern Kazakhstan, Central Asia)

et al. 2017

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“…Second, oxygen isotopic analysis of paleosol carbonates suggests an association between the stepwise increase in C 4 abundance and a combination of cooling temperatures, increased winter precipitation, and/or increased soil moisture, with particularly significant change across the PliocenePleistocene transition (Fox et al, 2012a)-a change reflected in the replacement of a more southern-adapted rodent community with one more adapted to temperate conditions (Martin et al, 2008). Based on the distribution and ecology of modern representatives, the same pattern holds for sciurids; Pliocene species with modern congeners either permit (I. meadensis) or support (O. rexroadensis and Ammospermophilus sp.)…”

Section: Discussionmentioning

confidence: 99%

Ground squirrels (Rodentia, Sciuridae) of the late Cenozoic Meade Basin sequence: diversity and paleoecological implications

Goodwin

Martin

2017

J. Paleontol.

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Abstract.-The Meade Basin, SW Kansas, yields a rich vertebrate fossil record from the late Cenozoic. Here, we review fossil ground squirrels (Sciuridae) from the region as a contribution to the broader Meade Basin Rodent Project. We recognize 14 species in seven genera: two species of giant ground squirrels (Paenemarmota Hibbard and Schultz, 1948) from the early Pliocene, and at least 12 species in six extant genera (Ammospermophilus Merriam, 1892; Otospermophilus Brandt, 1844; Ictidomys Allen, 1877; Poliocitellus Howell, 1938; Urocitellus Obolenskij, 1927; Cynomys Rafinesque, 1817) from the Pliocene-Pleistocene sequence, including the first regional records of Ammospermophilus. Based on dental morphology and the ecology of modern congeners, we interpret faunal change through the sequence as primarily reflecting a shift from a Pliocene assemblage of "southwestern" taxa with granivorous/omnivorous diets (relatively low-crowned, transversely narrow cheek teeth) in warm and at least occasionally dry shrub or shrub-steppe habitats (Ammospermophilus, Otospermophilus, Ictidomys meadensis [Hibbard, 1941a]), to a Pleistocene temperate assemblage of grazing taxa that either exhibited relatively high-crowned, transversely wider cheek teeth (Urocitellus, Cynomys, Ictidomys tridecemlineatus [Mitchill, 1821]) or were otherwise dependent on grassland habitats (Poliocitellus). The early Pleistocene Borchers assemblage was transitional in this regard, heralding a "revolution" observed as well with other clades in the Meade Basin rodent community. This interpretation is broadly congruent with evidence of Pliocene climatic change and the staged development of regional grasslands, with the modern proportion of C 3 /C 4 plants established in the Meade Basin during the early Pleistocene.

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“…During the Miocene (from ~ 23 Mya to ~ 5 Mya) a latitudinal gradient in C3 to C4 grasses abundance formed, with C4 grasses becoming more common in ecosystems of low productivity at high latitudes (Janis, 2008) (even if there is not much evidence for this trend in North America: Fraser and Theodor, 2013;Fox et al, 2012;Koch, 2004, 2003). The establishment of a more seasonal climate and the rise and expansion of new grassland tundra/steppe biomes provided new ecological opportunities.…”

Section: Accepted Manuscriptmentioning

confidence: 97%

Space and time: The two dimensions of Artiodactyla body mass evolution

Carotenuto

Diniz‐Filho

Raia

2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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Pedogenic carbonate stable isotope record of environmental change during the Neogene in the southern Great Plains, southwest Kansas, USA: Oxygen isotopes and paleoclimate during the evolution of C4-dominated grasslands

Cited by 33 publications

References 49 publications

Late Oligocene to early Miocene humidity change recorded in terrestrial sequences in the Ili Basin (south‐eastern Kazakhstan, Central Asia)

Late Oligocene to early Miocene humidity change recorded in terrestrial sequences in the Ili Basin (south‐eastern Kazakhstan, Central Asia)

Ground squirrels (Rodentia, Sciuridae) of the late Cenozoic Meade Basin sequence: diversity and paleoecological implications

Space and time: The two dimensions of Artiodactyla body mass evolution

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