Michael J C Walker
Dados Biográficos
| ID | 5601980 |
|---|---|
| NOME | Michael J C Walker |
| PRENOMES | Michael J C |
| SOBRENOME | Walker |
| ASSINATURA | WALKER M J C |
| VERIFICADO | Não |
| TOTAL DE OBRAS | 3 |
| TOTAL DE CITAÇÕES | 9 |
| TOTAL COMO AUTOR | 3 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 2000 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2010 |
| ÍNDICE H | 1 |
Formal ratification of the Quaternary System/Period and the Pleistocene Series/Epoch with a base at 2.58 Ma
In June 2009, the Executive Committee of the International Union of Geological Sciences (IUGS) formally ratified a proposal by the International Commission on Stratigraphy to lower the base of the Quaternary System/Period to the Global Stratotype Section and Point (GSSP) of the Gelasian Stage/Age at Monte San Nicola, Sicily, Italy. The Gelasian until then had been the uppermost stage of the Pliocene Series/Epoch. The base of the Gelasian correspo…
Implications for the Dating of Wisconsinan (Weichselian) Late-Glacial Events of Systematic Radiocarbon Age Differences between Terrestrial Plant Macrofossils from a Site in SW Ireland
AMS radiocarbon dates were obtained from Salix herbacea leaves, Carex seeds, and bulk organic detritus from a lake sediment profile of Wisconsinan (Weichselian) Lateglacial age in SW Ireland. There is a systematic age difference between the dated series from the two types of macrofossils, with ages obtained from Salix herbacea leaves being 900 to 1500 14 C years younger than those obtained from Carex seeds. The latter tend to be more in accord wi…
Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–9 14 C Ka Bp) in Terrestrial and Marine Records
The publication during the 1990s of Greenland ice-core records spanning the transition from the Last Cold Stage to the present interglacial (ca. 14–9 14 C ka BP) presented new challenges to scientists working on marine and terrestrial sequences from this important time interval. In particular, there is now an overriding imperative to increase the levels of precision by which events during this period can be dated and correlated. We review some of…
Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–9 14 C Ka Bp) in Terrestrial and Marine Records
The publication during the 1990s of Greenland ice-core records spanning the transition from the Last Cold Stage to the present interglacial (ca. 14–9 14 C ka BP) presented new challenges to scientists working on marine and terrestrial sequences from this important time interval. In particular, there is now an overriding imperative to increase the levels of precision by which events during this period can be dated and correlated. We review some of…
Implications for the Dating of Wisconsinan (Weichselian) Late-Glacial Events of Systematic Radiocarbon Age Differences between Terrestrial Plant Macrofossils from a Site in SW Ireland
AMS radiocarbon dates were obtained from Salix herbacea leaves, Carex seeds, and bulk organic detritus from a lake sediment profile of Wisconsinan (Weichselian) Lateglacial age in SW Ireland. There is a systematic age difference between the dated series from the two types of macrofossils, with ages obtained from Salix herbacea leaves being 900 to 1500 14 C years younger than those obtained from Carex seeds. The latter tend to be more in accord wi…
Radiocarbon Dating the Last Glacial-Interglacial Transition (Ca. 14–9 14 C Ka Bp) in Terrestrial and Marine Records
The publication during the 1990s of Greenland ice-core records spanning the transition from the Last Cold Stage to the present interglacial (ca. 14–9 14 C ka BP) presented new challenges to scientists working on marine and terrestrial sequences from this important time interval. In particular, there is now an overriding imperative to increase the levels of precision by which events during this period can be dated and correlated. We review some of…
Formal ratification of the Quaternary System/Period and the Pleistocene Series/Epoch with a base at 2.58 Ma
In June 2009, the Executive Committee of the International Union of Geological Sciences (IUGS) formally ratified a proposal by the International Commission on Stratigraphy to lower the base of the Quaternary System/Period to the Global Stratotype Section and Point (GSSP) of the Gelasian Stage/Age at Monte San Nicola, Sicily, Italy. The Gelasian until then had been the uppermost stage of the Pliocene Series/Epoch. The base of the Gelasian correspo…
Geology and Paleoclimatology Research (3 obras) · Pleistocene-Era Hominins and Archaeology (3 obras) · Geography (2 obras) · Geology (2 obras) · Holocene (2 obras) · Interglacial (2 obras) · Paleontology (2 obras) · Physical geography (2 obras) · Quaternary (2 obras) · Radiocarbon dating (2 obras)