Douglas F Williams
Biographic Data
| ID | 3585073 |
|---|---|
| NAME | Douglas F Williams |
| GIVEN NAMES | Douglas F |
| FAMILY NAME | Williams |
| SIGNATURE | WILLIAMS D F |
| AFFILIATIONS | University of South Carolina |
| ORCID | 0000-0002-0399-4261 |
| VERIFIED | Yes |
| TOTAL WORKS | 22 |
| TOTAL CITATIONS | 25 |
| AUTHOR COUNT | 22 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1975 |
| LATEST PUBLICATION YEAR | 2023 |
| H-INDEX | 4 |
Ula Thirra
Sharing Experiences in Designing Professional Learning to Support Hydrology and Water Resources Instructors to Create High-Quality Curricular Materials
The creation of high-quality curricular materials requires knowledge of curriculum design and a considerable time commitment. Instructors often have limited time to dedicate to the creation of curricular materials. Additionally, the knowledge and skills needed to develop high-quality materials are often not taught to instructors. Furthermore, similar learning material is often prepared by multiple instructors working at separate institutions, lea…
Isotopic analyses of prehistoric human remains from the Flinders Group, Queensland, Australia, support an association between burial practices and status
Hidden in plain sight
Ethnohistoric accounts indicate that the people of Australia's Channel Country engaged in activities rarely recorded elsewhere on the continent, including food storage, aquaculture and possible cultivation, yet there has been little archaeological fieldwork to verify these accounts. Here, the authors report on a collaborative research project initiated by the Mithaka people addressing this lack of archaeological investigation. The results show th…
A Community Bioarchaeology Project in the Flinders Group, Queensland, Australia
Watura Jurnti
Watura Jurnti (DAA #6287) was first occupied in 42000–45000 BP, with evidence of occupation continuing through the arid LGM and deglacial period to c.15000 BP. There was a very pronounced reduction in both occupation and deposition between c.15000 and 1500 BP. The small size and nature of the stone artefact assemblage indicates that use of the shelter has been intermittent and non‐intensive throughout most of the past 42–45 ka. Watura Jurnti is o…
The death of Kaakutja
Paleoenvironmental proxy records from Lake Hovsgol, Mongolia, and a synthesis of Holocene climate change in the Lake Baikal watershed
Here we discuss paleoenvironmental evolution in the Baikal region during the Holocene using new records of aquatic (diatom) and terrestrial vegetation changes from Hovsgol, Mongolia's largest and deepest lake. We reconcile previous contradictory Baikal timescales by constraining reservoir corrections of AMS dates on bulk sedimentary organic carbon. Synthesis of the Holocene records in the Baikal watershed reveals a northward progression in landsc…
Diatom biostratigraphy of Lake Baikal during the past 1.25Ma
Basin-wide sedimentation changes and deglacial lake-level rise in the Hovsgol basin, NW Mongolia
The Stability and the Abrupt Ending of the Last Interglaciation in Southeastern Siberia
Paleoproductivity records from Lake Baikal indicate that the last interglaciation in southeastern Siberia lasted ca. 12,000 yr from 127,000 to 115,000 yr B.P., was punctuated by a climatic oscillation about 120,000 yr ago, and ended abruptly with a rapid onset of regional glaciation during marine isotope substage (MIS) 5d. The Siberian equivalent of the MIS 5e–5d transition appears to lead the post-Eemian cold pulses in Europe and in the central …
Biogenic Silica Record of the Lake Baikal Response to Climatic Forcing during the Brunhes
This work presents a detailed, orbitally tuned biogenic silica record of continental paleoclimate change during the Brunhes chron. The Brunhes/Matuyama boundary lies within the warm isotopic stage 19 in Baikal, and the boundaries between eight lithological cycles correspond to terminations in the marine oxygen isotope record. The high amplitude and resolution of climatically driven changes in BioSi content in Lake Baikal sediments permits tuning …
Insolation regime in Siberia as a major factor controlling diatom production in Lake Baikal during the past 800,000 years
The link between tectonic and paleoclimatic events at 2.8–2.5MaBP in the Lake Baikal region
The detailed record of climatic events during the past 75,000 yrs BP from the Lake Baikal drill core BDP-93-2
The Lake Baikal drilling project in the context of a global lake drilling initiative
Evidence from Lake Baikal for Siberian Glaciation during Oxygen-Isotope Substage 5d
The paleoclimatic record from bottom sediments of Lake Baikal (eastern Siberia) reveals new evidence for an abrupt and intense glaciation during the initial part of the last interglacial period (isotope substage 5d). This glaciation lasted about 12,000 yr from 117,000 to 105,000 yr B.P. according to correlation with the SPECMAP isotope chronology. Lithological and biogeochemical evidence of glaciation from Lake Baikal agrees with evidence for the…
Tephrochronology of the Western Gulf of Mexico for the Last 185,000 Years
Tephra in 31 piston cores from the western Gulf of Mexico and 7 piston cores from the equatorial Pacific were analyzed by electron microprobe. Six ash layers in the western Gulf of Mexico were easily distinguished by TiO 2 , FeO, and CaO contents and correlated by geochemistry in order to determine the distribution pattern for each ash layer. Correlation by geochemistry is an easier, more accurate method than biostratigraphic correlation; some of…
Canadian Food Aid
The Age, Origin, and Volcanological Significance of the Y-5 Ash Layer in the Mediterranean
The Y-5 ash is the most widespread layer in deep-sea sediments from the eastern Mediterranean. This ash layer was previously correlated with the Citara-Serrara tuff on Ischia Island and dated at approximately 25,000 yr B.P. New data on the glass chemistry of the Y-5 ash and pyroclastic deposits from the Neopolitan volcanic province suggest that the layer is correlative with the large-volume Campanian ignimbrite and not with the deposit from Ischi…
Comparison of Radiolarian/Planktonic Foraminiferal Paleoceanography of the Subantarctic Indian Ocean
A detailed paleoceanographic history of the Subantarctic region for the last million years was determined using paleomagnetic stratigraphy, radiolarian and planktonic foraminiferal biostratigraphy, and the oxygen isotope record from stages 1 to 13 (0.5 MY) in a deep-sea core (E45-74) from the southern Indian Ocean. Changes in the abundances of Antarctissa strelkovi and Neogloboquadrina pachyderma record 12 glacial/interglacial cycles. The paleoce…
Diversity of Recent Planktonic Foraminifera in the Southern Indian Ocean and Late Pleistocene Paleotemperatures
Planktonic foraminiferal assemblages have been examined in 25 trigger core top samples and 51 piston core top samples collected between latitudes 28° S and 55° S and longitudes 79° E and 120° E from the southern Indian Ocean during cruises of the U.S.N.S. Eltanin . Samples taken from water depths exceeding 4000 m and/or showing evidence of calcium carbonate dissolution were eliminated from further analysis. The final piston core data set consists…
Hidden in plain sight
Ethnohistoric accounts indicate that the people of Australia's Channel Country engaged in activities rarely recorded elsewhere on the continent, including food storage, aquaculture and possible cultivation, yet there has been little archaeological fieldwork to verify these accounts. Here, the authors report on a collaborative research project initiated by the Mithaka people addressing this lack of archaeological investigation. The results show th…
Isotopic analyses of prehistoric human remains from the Flinders Group, Queensland, Australia, support an association between burial practices and status
Watura Jurnti
Watura Jurnti (DAA #6287) was first occupied in 42000–45000 BP, with evidence of occupation continuing through the arid LGM and deglacial period to c.15000 BP. There was a very pronounced reduction in both occupation and deposition between c.15000 and 1500 BP. The small size and nature of the stone artefact assemblage indicates that use of the shelter has been intermittent and non‐intensive throughout most of the past 42–45 ka. Watura Jurnti is o…
Ula Thirra
A Community Bioarchaeology Project in the Flinders Group, Queensland, Australia
Diversity of Recent Planktonic Foraminifera in the Southern Indian Ocean and Late Pleistocene Paleotemperatures
Planktonic foraminiferal assemblages have been examined in 25 trigger core top samples and 51 piston core top samples collected between latitudes 28° S and 55° S and longitudes 79° E and 120° E from the southern Indian Ocean during cruises of the U.S.N.S. Eltanin . Samples taken from water depths exceeding 4000 m and/or showing evidence of calcium carbonate dissolution were eliminated from further analysis. The final piston core data set consists…
Comparison of Radiolarian/Planktonic Foraminiferal Paleoceanography of the Subantarctic Indian Ocean
A detailed paleoceanographic history of the Subantarctic region for the last million years was determined using paleomagnetic stratigraphy, radiolarian and planktonic foraminiferal biostratigraphy, and the oxygen isotope record from stages 1 to 13 (0.5 MY) in a deep-sea core (E45-74) from the southern Indian Ocean. Changes in the abundances of Antarctissa strelkovi and Neogloboquadrina pachyderma record 12 glacial/interglacial cycles. The paleoce…
The Age, Origin, and Volcanological Significance of the Y-5 Ash Layer in the Mediterranean
The Y-5 ash is the most widespread layer in deep-sea sediments from the eastern Mediterranean. This ash layer was previously correlated with the Citara-Serrara tuff on Ischia Island and dated at approximately 25,000 yr B.P. New data on the glass chemistry of the Y-5 ash and pyroclastic deposits from the Neopolitan volcanic province suggest that the layer is correlative with the large-volume Campanian ignimbrite and not with the deposit from Ischi…
Canadian Food Aid
Tephrochronology of the Western Gulf of Mexico for the Last 185,000 Years
Tephra in 31 piston cores from the western Gulf of Mexico and 7 piston cores from the equatorial Pacific were analyzed by electron microprobe. Six ash layers in the western Gulf of Mexico were easily distinguished by TiO 2 , FeO, and CaO contents and correlated by geochemistry in order to determine the distribution pattern for each ash layer. Correlation by geochemistry is an easier, more accurate method than biostratigraphic correlation; some of…
Evidence from Lake Baikal for Siberian Glaciation during Oxygen-Isotope Substage 5d
The paleoclimatic record from bottom sediments of Lake Baikal (eastern Siberia) reveals new evidence for an abrupt and intense glaciation during the initial part of the last interglacial period (isotope substage 5d). This glaciation lasted about 12,000 yr from 117,000 to 105,000 yr B.P. according to correlation with the SPECMAP isotope chronology. Lithological and biogeochemical evidence of glaciation from Lake Baikal agrees with evidence for the…
Biogenic Silica Record of the Lake Baikal Response to Climatic Forcing during the Brunhes
This work presents a detailed, orbitally tuned biogenic silica record of continental paleoclimate change during the Brunhes chron. The Brunhes/Matuyama boundary lies within the warm isotopic stage 19 in Baikal, and the boundaries between eight lithological cycles correspond to terminations in the marine oxygen isotope record. The high amplitude and resolution of climatically driven changes in BioSi content in Lake Baikal sediments permits tuning …
Insolation regime in Siberia as a major factor controlling diatom production in Lake Baikal during the past 800,000 years
The link between tectonic and paleoclimatic events at 2.8–2.5MaBP in the Lake Baikal region
The detailed record of climatic events during the past 75,000 yrs BP from the Lake Baikal drill core BDP-93-2
The Lake Baikal drilling project in the context of a global lake drilling initiative
The Stability and the Abrupt Ending of the Last Interglaciation in Southeastern Siberia
Paleoproductivity records from Lake Baikal indicate that the last interglaciation in southeastern Siberia lasted ca. 12,000 yr from 127,000 to 115,000 yr B.P., was punctuated by a climatic oscillation about 120,000 yr ago, and ended abruptly with a rapid onset of regional glaciation during marine isotope substage (MIS) 5d. The Siberian equivalent of the MIS 5e–5d transition appears to lead the post-Eemian cold pulses in Europe and in the central …
Diatom biostratigraphy of Lake Baikal during the past 1.25Ma
Basin-wide sedimentation changes and deglacial lake-level rise in the Hovsgol basin, NW Mongolia
Paleoenvironmental proxy records from Lake Hovsgol, Mongolia, and a synthesis of Holocene climate change in the Lake Baikal watershed
Here we discuss paleoenvironmental evolution in the Baikal region during the Holocene using new records of aquatic (diatom) and terrestrial vegetation changes from Hovsgol, Mongolia's largest and deepest lake. We reconcile previous contradictory Baikal timescales by constraining reservoir corrections of AMS dates on bulk sedimentary organic carbon. Synthesis of the Holocene records in the Baikal watershed reveals a northward progression in landsc…
The death of Kaakutja
Watura Jurnti
Watura Jurnti (DAA #6287) was first occupied in 42000–45000 BP, with evidence of occupation continuing through the arid LGM and deglacial period to c.15000 BP. There was a very pronounced reduction in both occupation and deposition between c.15000 and 1500 BP. The small size and nature of the stone artefact assemblage indicates that use of the shelter has been intermittent and non‐intensive throughout most of the past 42–45 ka. Watura Jurnti is o…
A Community Bioarchaeology Project in the Flinders Group, Queensland, Australia
Isotopic analyses of prehistoric human remains from the Flinders Group, Queensland, Australia, support an association between burial practices and status
Hidden in plain sight
Ethnohistoric accounts indicate that the people of Australia's Channel Country engaged in activities rarely recorded elsewhere on the continent, including food storage, aquaculture and possible cultivation, yet there has been little archaeological fieldwork to verify these accounts. Here, the authors report on a collaborative research project initiated by the Mithaka people addressing this lack of archaeological investigation. The results show th…
Sharing Experiences in Designing Professional Learning to Support Hydrology and Water Resources Instructors to Create High-Quality Curricular Materials
The creation of high-quality curricular materials requires knowledge of curriculum design and a considerable time commitment. Instructors often have limited time to dedicate to the creation of curricular materials. Additionally, the knowledge and skills needed to develop high-quality materials are often not taught to instructors. Furthermore, similar learning material is often prepared by multiple instructors working at separate institutions, lea…
Ula Thirra
Geology and Paleoclimatology Research (15 works) · Geography (10 works) · Pleistocene-Era Hominins and Archaeology (10 works) · Geology (9 works) · Geology (8 works) · Archaeology (7 works) · Glacial period (7 works) · Oceanography (7 works) · Paleontology (7 works) · Paleontology (7 works)