Robert Weems (Former Employee)
Science and Products
Filter Total Items: 68
The "terminal Triassic catastrophic extinction event" in perspective: A review of carboniferous through Early Jurassic terrestrial vertebrate extinction patterns The "terminal Triassic catastrophic extinction event" in perspective: A review of carboniferous through Early Jurassic terrestrial vertebrate extinction patterns
A catastrophic terminal Triassic extinction event among terrestrial vertebrates is not supported by available evidence. The current model for such an extinction is based on at least eight weak or untenable assumptions: (1) a terminal Triassic extinction-inducing asteroid impact occurred, (2) a terminal Triassic synchronous mass extinction of terrestrial vertebrates occurred, (3) a...
Authors
R.E. Weems
Earthquake-induced liquefaction features in the coastal setting of South Carolina and in the fluvial setting of the New Madrid seismic zone Earthquake-induced liquefaction features in the coastal setting of South Carolina and in the fluvial setting of the New Madrid seismic zone
Many types of liquefaction-related features (sand blows, fissures, lateral spreads, dikes, and sills) have been induced by earthquakes in coastal South Carolina and in the New Madrid seismic zone in the Central United States. In addition, abundant features of unknown and nonseismic origin are present. Geologic criteria for interpreting an earthquake origin in these areas are illustrated...
Authors
S. F. Obermeier, R. B. Jacobson, J. Smoot, R.E. Weems, G. Gohn, J.E. Monroe, D.S. Powars
Strong correlation of major earthquakes with solid-earth tides in part of the eastern United States Strong correlation of major earthquakes with solid-earth tides in part of the eastern United States
East of the eastern American continental divide and south of fat 42.5°N, moderate to large historic earthquakes correlate strongly with times of high and low solid-earth tides. This effect is most pronounced when solar declination lies between 17°N and 17°S. Significant correlations also exist between major earthquakes, time of day, lunar declinations, and lunar phase.
Authors
R.E. Weems, W.H. Perry
Geologic map of the Moncks Corner quadrangle, Berkeley County, South Carolina Geologic map of the Moncks Corner quadrangle, Berkeley County, South Carolina
No abstract available.
Authors
R.E. Weems, Earl M. Lemon
Geologic map of the Ladson quadrangle, Berkeley, Charleston, and Dorchester Counties, South Carolina Geologic map of the Ladson quadrangle, Berkeley, Charleston, and Dorchester Counties, South Carolina
No abstract available.
Authors
R.E. Weems, Earl M. Lemon
Earthquake-induced liquefaction features in the coastal South Carolina region Earthquake-induced liquefaction features in the coastal South Carolina region
No abstract available.
Authors
S. F. Obermeier, R.E. Weems, R. B. Jacobson
Additions and revisions to the auger hole records for the Cainhoy and Charleston quadrangles, South Carolina Additions and revisions to the auger hole records for the Cainhoy and Charleston quadrangles, South Carolina
No abstract available.
Authors
R.E. Weems, G. Gohn, B. Houser
Detailed sections from auger holes and outcrops in the Pringletown, Ridgeville, Summerville Northwest, and Summerville quadrangles, South Carolina Detailed sections from auger holes and outcrops in the Pringletown, Ridgeville, Summerville Northwest, and Summerville quadrangles, South Carolina
No abstract available.
Authors
R.E. Weems, E. Lemon, M. Nelson, G. Gohn, B. Houser
Detailed sections from auger holes and outcrops in the Clubhouse Crossroads, Johns Island, Osborn, and Ravenel quadrangles, South Carolina Detailed sections from auger holes and outcrops in the Clubhouse Crossroads, Johns Island, Osborn, and Ravenel quadrangles, South Carolina
No abstract available.
Authors
Robert Weems, Earl Lemon, Gregory S. Gohn, Brenda Houser
HOLOCENE AND LATE PLEISTOCENE(? ) EARTHQUAKE-INDUCED SAND BLOWS IN COASTAL SOUTH CAROLINA. HOLOCENE AND LATE PLEISTOCENE(? ) EARTHQUAKE-INDUCED SAND BLOWS IN COASTAL SOUTH CAROLINA.
Multiple generations of prehistoric sand blows, interpreted as earthquake induced, have been discovered throughout coastal South Carolina. These sand blows extend far beyond 1886 earthquake induced sand blows, in sediments having approximately the same liquefaction susceptibility. The seismic source zone for the prehistoric sand blows is unknown. The different distributions of...
Authors
S. F. Obermeier, R. B. Jacobson, D.S. Powars, R.E. Weems, D.C. Hallbick, G. Gohn, H. Markewich
EVIDENCE FOR THREE MODERATE TO LARGE PREHISTORIC HOLOCENE EARTHQUAKES NEAR CHARLESTON, S. C. EVIDENCE FOR THREE MODERATE TO LARGE PREHISTORIC HOLOCENE EARTHQUAKES NEAR CHARLESTON, S. C.
Earthquake-induced liquefaction features (sand blows), found near Hollywood, S. C. , have yielded abundant clasts of humate-impregnated sand and sparse pieces of wood. Radiocarbon ages for the humate and wood provide sufficient control on the timing of the earthquakes that produced the sand blows to indicate that at least three prehistoric liquefaction-producing earthquakes (m//b...
Authors
Robert Weems, Stephen Obermeier, Milan Pavich, Gregory S. Gohn, Meyer Rubin, Richard Phipps, Robert Jacobson
Geologic evidence for recurrent moderate to large earthquakes near Charleston, South Carolina Geologic evidence for recurrent moderate to large earthquakes near Charleston, South Carolina
Multiple generations of earthquake-induced sand blows in Quaternary sediments and soils near Charleston, South Carolina, are evidence of recurrent moderate to large earthquakes in that area. The large 1886 earthquake, the only historic earthquake known to have produced sand blows at Charleston, probably caused the youngest observed blows. Older (late Quaternary) sand blows in the...
Authors
Stephen Obermeier, Gregory Gohn, Robert Weems, R. Gelinas, Meyer Rubin
Science and Products
Filter Total Items: 68
The "terminal Triassic catastrophic extinction event" in perspective: A review of carboniferous through Early Jurassic terrestrial vertebrate extinction patterns The "terminal Triassic catastrophic extinction event" in perspective: A review of carboniferous through Early Jurassic terrestrial vertebrate extinction patterns
A catastrophic terminal Triassic extinction event among terrestrial vertebrates is not supported by available evidence. The current model for such an extinction is based on at least eight weak or untenable assumptions: (1) a terminal Triassic extinction-inducing asteroid impact occurred, (2) a terminal Triassic synchronous mass extinction of terrestrial vertebrates occurred, (3) a...
Authors
R.E. Weems
Earthquake-induced liquefaction features in the coastal setting of South Carolina and in the fluvial setting of the New Madrid seismic zone Earthquake-induced liquefaction features in the coastal setting of South Carolina and in the fluvial setting of the New Madrid seismic zone
Many types of liquefaction-related features (sand blows, fissures, lateral spreads, dikes, and sills) have been induced by earthquakes in coastal South Carolina and in the New Madrid seismic zone in the Central United States. In addition, abundant features of unknown and nonseismic origin are present. Geologic criteria for interpreting an earthquake origin in these areas are illustrated...
Authors
S. F. Obermeier, R. B. Jacobson, J. Smoot, R.E. Weems, G. Gohn, J.E. Monroe, D.S. Powars
Strong correlation of major earthquakes with solid-earth tides in part of the eastern United States Strong correlation of major earthquakes with solid-earth tides in part of the eastern United States
East of the eastern American continental divide and south of fat 42.5°N, moderate to large historic earthquakes correlate strongly with times of high and low solid-earth tides. This effect is most pronounced when solar declination lies between 17°N and 17°S. Significant correlations also exist between major earthquakes, time of day, lunar declinations, and lunar phase.
Authors
R.E. Weems, W.H. Perry
Geologic map of the Moncks Corner quadrangle, Berkeley County, South Carolina Geologic map of the Moncks Corner quadrangle, Berkeley County, South Carolina
No abstract available.
Authors
R.E. Weems, Earl M. Lemon
Geologic map of the Ladson quadrangle, Berkeley, Charleston, and Dorchester Counties, South Carolina Geologic map of the Ladson quadrangle, Berkeley, Charleston, and Dorchester Counties, South Carolina
No abstract available.
Authors
R.E. Weems, Earl M. Lemon
Earthquake-induced liquefaction features in the coastal South Carolina region Earthquake-induced liquefaction features in the coastal South Carolina region
No abstract available.
Authors
S. F. Obermeier, R.E. Weems, R. B. Jacobson
Additions and revisions to the auger hole records for the Cainhoy and Charleston quadrangles, South Carolina Additions and revisions to the auger hole records for the Cainhoy and Charleston quadrangles, South Carolina
No abstract available.
Authors
R.E. Weems, G. Gohn, B. Houser
Detailed sections from auger holes and outcrops in the Pringletown, Ridgeville, Summerville Northwest, and Summerville quadrangles, South Carolina Detailed sections from auger holes and outcrops in the Pringletown, Ridgeville, Summerville Northwest, and Summerville quadrangles, South Carolina
No abstract available.
Authors
R.E. Weems, E. Lemon, M. Nelson, G. Gohn, B. Houser
Detailed sections from auger holes and outcrops in the Clubhouse Crossroads, Johns Island, Osborn, and Ravenel quadrangles, South Carolina Detailed sections from auger holes and outcrops in the Clubhouse Crossroads, Johns Island, Osborn, and Ravenel quadrangles, South Carolina
No abstract available.
Authors
Robert Weems, Earl Lemon, Gregory S. Gohn, Brenda Houser
HOLOCENE AND LATE PLEISTOCENE(? ) EARTHQUAKE-INDUCED SAND BLOWS IN COASTAL SOUTH CAROLINA. HOLOCENE AND LATE PLEISTOCENE(? ) EARTHQUAKE-INDUCED SAND BLOWS IN COASTAL SOUTH CAROLINA.
Multiple generations of prehistoric sand blows, interpreted as earthquake induced, have been discovered throughout coastal South Carolina. These sand blows extend far beyond 1886 earthquake induced sand blows, in sediments having approximately the same liquefaction susceptibility. The seismic source zone for the prehistoric sand blows is unknown. The different distributions of...
Authors
S. F. Obermeier, R. B. Jacobson, D.S. Powars, R.E. Weems, D.C. Hallbick, G. Gohn, H. Markewich
EVIDENCE FOR THREE MODERATE TO LARGE PREHISTORIC HOLOCENE EARTHQUAKES NEAR CHARLESTON, S. C. EVIDENCE FOR THREE MODERATE TO LARGE PREHISTORIC HOLOCENE EARTHQUAKES NEAR CHARLESTON, S. C.
Earthquake-induced liquefaction features (sand blows), found near Hollywood, S. C. , have yielded abundant clasts of humate-impregnated sand and sparse pieces of wood. Radiocarbon ages for the humate and wood provide sufficient control on the timing of the earthquakes that produced the sand blows to indicate that at least three prehistoric liquefaction-producing earthquakes (m//b...
Authors
Robert Weems, Stephen Obermeier, Milan Pavich, Gregory S. Gohn, Meyer Rubin, Richard Phipps, Robert Jacobson
Geologic evidence for recurrent moderate to large earthquakes near Charleston, South Carolina Geologic evidence for recurrent moderate to large earthquakes near Charleston, South Carolina
Multiple generations of earthquake-induced sand blows in Quaternary sediments and soils near Charleston, South Carolina, are evidence of recurrent moderate to large earthquakes in that area. The large 1886 earthquake, the only historic earthquake known to have produced sand blows at Charleston, probably caused the youngest observed blows. Older (late Quaternary) sand blows in the...
Authors
Stephen Obermeier, Gregory Gohn, Robert Weems, R. Gelinas, Meyer Rubin