Lily Pfeifer

Lily Pfeifer
University of Oklahoma | ou · School of Geosciences

About

20
Publications
2,712
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114
Citations
Citations since 2016
18 Research Items
101 Citations
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20162017201820192020202120220510152025
20162017201820192020202120220510152025

Publications

Publications (20)
Article
Full-text available
Paleo-loess and silty eolian-marine strata are well recognized across the Carboniferous-Permian of equatorial Pangaea. Eolian-transported dust and loess appear in the late Devonian in the west, are common by the Late Carboniferous, and predominate across equatorial Pangaea by the Permian. The thickest loess deposits in Earth history –>1000 m− date...
Article
Full-text available
Earth has sustained continental glaciation several times in its past. Because continental glaciers ground to low elevations, sedimentary records of ice contact can be preserved from regions that were below base level, or subject to subsidence. In such regions, glaciated pavements, ice-contact deposits such as glacial till with striated clasts, and...
Article
Full-text available
Delicate impressions in lacustrine strata of the lower Permian (lower Cisuralian) Usclas Formation record ephemeral freezing in equatorial Pangea. These sediments accumulated in the paleoequatorial and intramontane Lodève Basin (southern Massif Central, France) during peak icehouse conditions of the Late Paleozoic Ice Age. Experimental replication...
Article
Full-text available
Chamberlin and Salisbury's assessment of the Permian a century ago captured the essence of the period: it is an interval of extremes yet one sufficiently recent to have affected a biosphere with near-modern complexity. The events of the Permian – the orogenic episodes, massive biospheric turnovers, both icehouse and greenhouse antitheses, and Mars-...
Article
This paper presents results from our multi-year NSF-IRES program: a four-week, field-based summer program involving the participation and mentorship of U.S. undergraduate geoscience cohorts to develop knowledge and skills in sedimentary geology while immersed in an international research collaboration. Student participants in our program are predom...
Article
Full-text available
Carboniferous−Permian strata in basins within the Central Pangean Mountains in France archive regional paleoequatorial climate during a unique interval in geological history (Pangea assembly, ice-age collapse, megamonsoon inception). The voluminous (∼1.5 km) succession of exclusively fine-grained red beds that comprises the Permian Salagou Formatio...
Article
Full-text available
We present the findings from analysis and modeling of a stratigraphic series of magnetic susceptibility (MS) data measured with a portable MS meter from the Permian Salagou Formation loessite (south-central France). The results reveal discernible Milankovitch-scale paleoclimatic variability throughout the Salagou Formation, recording astronomically...
Conference Paper
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Link to Abstract: https://agu.confex.com/agu/fm19/meetingapp.cgi/Paper/582480 Pfeifer, L.S., Soreghan, G.S., Hinnov, L., Pochat, S., Paleoclimatic significance of Permian loess and dust in Variscan basins of eastern equatorial Pangaea. American Geophysical Union Fall Meeting, December, 2019. Bibcode 2019AGUFMPP12A..07P,
Article
Full-text available
The paleogeographic reconstruction of the Variscan Mountains during late Carboniferous- Permian post-orogenic extension remains poorly understood, owing to the subsequent erosion and/or burial of most associated sedimentary basins during the Mesozoic. The Graissessac- Lodève Basin (southern France) preserves a thick and exceptionally complete recor...
Article
Detrital zircon and igneous zircon U-Pb ages are reported from Proterozoic metamorphic rocks in northern New Mexico. These data give new insight into the provenance and depositional age of a >3-km-thick metasedimentary succession and help resolve the timing of orogenesis within an area of overlapping accretionary orogens and thermal events related...

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