Florence Bascom Geoscience Center

Publications

Filter Total Items: 385
Publication Thumbnail
Year Published: 2011

Sensitivity of Pliocene ice sheets to orbital forcing

The stability of the Earth's major ice sheets is a critical uncertainty in predictions of future climate and sea level change. One method of investigating the behaviour of the Greenland and the Antarctic ice sheets in a warmer-than-modern climate is to look back at past warm periods of Earth history, for example the Pliocene. This paper presents...

Dolan, A.M.; Haywood, A.M.; Hill, D.J.; Dowsett, H.J.; Hunter, S.J.; Lunt, D.J.; Pickering, S.J.
Sensitivity of Pliocene ice sheets to orbital forcing; 2011; Article; Journal; Palaeogeography, Palaeoclimatology, Palaeoecology; Dolan, A. M.; Haywood, A. M.; Hill, D. J.; Dowsett, H. J.; Hunter, S. J.; Lunt, D. J.; Pickering, S. J.

Publication Thumbnail
Year Published: 2011

U.S. Geological Survey: A synopsis of Three-dimensional Modeling

The U.S. Geological Survey (USGS) is a multidisciplinary agency that provides assessments of natural resources (geological, hydrological, biological), the disturbances that affect those resources, and the disturbances that affect the built environment, natural landscapes, and human society. Until now, USGS map products have been generated and...

Jacobsen, Linda J.; Glynn, Pierre D.; Phelps, Geoff A.; Orndorff, Randall C.; Bawden, Gerald W.; Grauch, V.J.S.
U.S. Geological Survey: A synopsis of Three-dimensional Modeling; 2011; Book chapter; Book; Chapter 13 in Synopsis of Current Three-dimensional Geological Mapping and Modeling in Geological Survey Organizations; Jacobsen, Linda J.; Glynn, Pierre D.; Phelps, Geoff A.; Orndorff, Randall C.; Bawden, Gerald W.; Grauch, V.J.S.

Publication Thumbnail
Year Published: 2010

Pliocene climate

The Pliocene Epoch, 5.3 Ma to 1.8 Ma, was a time when paleoclimate conditions ranged from very warm, equable climates (on a global scale), rhythmically varying every 40,000 years, to high-amplitude glacial-interglacial cycles that led to the “Ice Ages” of the Pleistocene. Evidence for paleoclimate conditions comes from fossils,...

Dowsett, Harry J.; Caballero-Gill, R. P.

Publication Thumbnail
Year Published: 2010

A model for Iapetan rifting of Laurentia based on Neoproterozoic dikes and related rocks

Geologic evidence of the Neoproterozoic rifting of Laurentia during breakup of Rodinia is recorded in basement massifs of the cratonic margin by dike swarms, volcanic and plutonic rocks, and rift-related clastic sedimentary sequences. The spatial and temporal distribution of these geologic features varies both within and between the massifs but...

Burton, William C.; Southworth, Scott
A model for Iapetan rifting of Laurentia based on Neoproterozoic dikes and related rocks; 2010; Article; Journal; GSA Memoirs; Burton, William C.; Southworth, Scott

Publication Thumbnail
Year Published: 2010

Petrography, mineralogy, and geochemistry of deep gravelly sands in the Eyreville B core, Chesapeake Bay impact structure

The ICDP–USGS Eyreville drill cores in the Chesapeake Bay impact structure reached a total depth of 1766 m and comprise (from the bottom upwards) basement-derived schists and granites/pegmatites, impact breccias, mostly poorly lithified gravelly sand and crystalline blocks, a granitic slab, sedimentary breccias, and postimpact sediments. The...

Bartosova, Katerina; Gier, Susanne; Horton, J. Wright; Koeberl, Christian; Mader, Dieter; Dypvik, Henning
Petrography, mineralogy, and geochemistry of deep gravelly sands in the Eyreville B core, Chesapeake Bay impact structure; 2010; Article; Journal; Meteoritics & Planetary Science; Bartosova, Katerina ; Gier, Susanne ; Horton, J. Wright, Jr.; Koeberl, Christian ; Mader, Dieter ; Dypvik, Henning

Publication Thumbnail
Year Published: 2010

Aviation response to a widely dispersed volcanic ash and gas cloud from the August 2008 eruption of Kasatochi, Alaska, USA

The extensive volcanic cloud from Kasatochi's 2008 eruption caused widespread disruptions to aviation operations along Pacific oceanic, Canadian, and U.S. air routes. Based on aviation hazard warnings issued by the National Oceanic and Atmospheric Administration, U.S. Geological Survey, the Federal Aviation Administration, and Meteorological...

Guffanti, Marianne; Schneider, David J.; Wallace, Kristi L.; Hall, Tony; Bensimon, Dov R.; Salinas, Leonard J.
Aviation response to a widely dispersed volcanic ash and gas cloud from the August 2008 eruption of Kasatochi, Alaska, USA; 2010; Article; Journal; Journal of Geophysical Research: Atmospheres; Guffanti, Marianne ; Schneider, David J.; Wallace, Kristi L.; Hall, Tony ; Bensimon, Dov R.; Salinas, Leonard J.

Publication Thumbnail
Year Published: 2010

Conodont biostratigraphy of a more complete Reef Trail Member section near the type section, latest Guadalupian Series type region

The original type section of the Reef Trail Member (uppermost part of the Bell Canyon Formation) is called the Park Boundary Section, and is less than satisfactory in several aspects. We propose a new reference section designated Reef Trail Reference section 1 (RTR1) on the same hill as the original type section. Section RTR1 compensates for some...

Wardlaw, Bruce R.; Lambert, L.L.; Bell, G.L.; Fronimos, J.A.; Yisa, M.O.
Conodont biostratigraphy of a more complete Reef Trail Member section near the type section, latest Guadalupian Series type region; 2010; Article; Journal; Micropaleontology; Bruce R Wardlaw;Lambert, L. L.;Bell, G. L., Jr.;Fronimos, J. A.;Yisa, M. O.

Publication Thumbnail
Year Published: 2010

Did intense volcanism trigger the first Late Ordovician icehouse?

Oxygen isotopes measured on Late Ordovician conodonts from Minnesota and Kentucky (United States) were studied to reconstruct the paleotemperature history during late Sandbian to Katian (Mohawkian–Cincinnatian) time. This time interval was characterized by intense volcanism, as shown by the prominent Deicke, Millbrig, and other K-bentonite beds. A...

Buggisch, Werner; Joachimski, Michael M.; Lehnert, Oliver; Bergström, Stig M.; Repetski, John E.; Webers, Gerald F.
Did intense volcanism trigger the first Late Ordovician icehouse?; 2010; Article; Journal; Geology; Buggisch, Werner ; Joachimski, Michael M.; Lehnert, Oliver ; Bergström, Stig M.; Repetski, John E.; Webers, Gerald F.

Publication Thumbnail
Year Published: 2010

Geologic characteristics and movement of the Meadow Creek landslide, part of the Coal Hill landslide complex, western Kane County, Utah

The Meadow Creek landslide, part of the Coal Hill landslide complex in western Kane County, Utah, is about 1.7 miles (2.7 km) wide and 1.3 miles (2.1 km) long and contains six smaller historical slides. The upper part of the Meadow Creek landslide is gently sloping and consists of displaced and back-rotated blocks of Cretaceous Dakota and Cedar...

Carney, Stephanie M.; Tabet, David E.; Johnson, Cari L.; Ashland, Francis X.; McDonald, Greg N.
Geologic characteristics and movement of the Meadow Creek landslide, part of the Coal Hill landslide complex, western Kane County, Utah; 2010; Article; Other Government Series; Utah Geological Association Publication 39: Geology of South-Central Utah; Ashland, Francis X.; McDonald, Greg N.

Publication Thumbnail
Year Published: 2010

Tectonics of the Maryland Piedmont along the Potomac River; insight since 1960 and potential transfer to the Pennsylvania Piedmont

This is a summary of a half century of research in the Mary land Piedmont and how it may or may not have implications for the Piedmont of Pennsylvania. Much of the field mapping and all of the isotopic analyses of rocks and minerals of the Maryland Piedmont have been conducted since the 1960 Field Conference of Pennsylvania Geologists “Some...

Wise, Donald U.; Fleeger, Gary M.; Southworth, C. Scott
Tectonics of the Maryland Piedmont along the Potomac River; insight since 1960 and potential transfer to the Pennsylvania Piedmont; 2010; Article; Conference publication; Tectonics of the Susquehanna Piedmont in Lancaster, Dauphin, and York Counties, Pa.: proceedings of a symposium associated with the 75th Field Conference of Pennsylvania Geologists, Lancaster, Pa., September 23, 2010; Southworth, C. Scott

Publication Thumbnail
Year Published: 2010

Climate change lessons from a warm world

In the early 1970’s to early 1980’s Soviet climatologists were making comparisons to past intervals of warmth in the geologic record and suggesting that these intervals could be possible analogs for 21st century “greenhouse” conditions. Some saw regional warming as a benefit to the Soviet Union and made comments along the lines of “Set fire to the...

Dowsett, Harry J.

Publication Thumbnail
Year Published: 2010

The PRISM3D paleoenvironmental reconstruction

The Pliocene Research, Interpretation and Synoptic Mapping (PRISM) paleoenvironmental reconstruction is an internally consistent and comprehensive global synthesis of a past interval of relatively warm and stable climate. It is regularly used in model studies that aim to better understand Pliocene climate, to improve model performance in future...

Dowsett, H.; Robinson, M.; Haywood, A.M.; Salzmann, U.; Hill, Daniel; Sohl, L.E.; Chandler, M.; Williams, Mark; Foley, K.; Stoll, D.K.
The PRISM3D paleoenvironmental reconstruction; 2010; Article; Journal; Stratigraphy; Dowsett, H.; Robinson, M.; Haywood, A.M.; Salzmann, U.; Hill, Daniel; Sohl, L.E.; Chandler, M.; Williams, Mark; Foley, K.; Stoll, D.K.