T van der Hammen
Biographic Data
| ID | 6371192 |
|---|---|
| NAME | T van der Hammen |
| GIVEN NAMES | T |
| FAMILY NAME | van der Hammen |
| SIGNATURE | VAN DER HAMMEN T |
| AFFILIATIONS | University of Amsterdam |
| ORCID | 0000-0001-5131-4542 |
| VERIFIED | Yes |
| TOTAL WORKS | 7 |
| TOTAL CITATIONS | 8 |
| AUTHOR COUNT | 7 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1957 |
| LATEST PUBLICATION YEAR | 2004 |
| H-INDEX | 2 |
Vegetation disturbance and human population in Colombia - a regional reconstruction
Palaeoecologists using pollen to map vegetation since the last ice age have noted numerous changes - which they feel increasingly obliged to blame on humans. These changes, such as deforestation or the dominance of certain plants, may happen suddenly or take place over thousands of years. The authors study the pollen record in Colombia, identify plants diagnostic of cultivation or disturbed ground ("degraded vegetation") and use them to map human…
Paleoenvironmental Changes and Glacial Stades of the Last 50,000 Years in the Cordillera Central, Colombia
Using data from glacial geomorphology, tephra-soil stratigraphy and mineralogy, palynology, and radiocarbon dating, a sequence of glacial and bioclimatic stades and interstades has been identified for the past ca. 50,000 yr in the Ruı́z-Tolima massif, Cordillera Central. Six cold stades separated by warmer interstades occurred before 48,000, between 48,000 and 33,000, between 28,000 and 21,000, from ≥16,000 to ca. 14,000, ca. 13,000–12,400, and c…
The Pliocene and Quaternary of the high plain of Bogotá (Colombia)
Holocene changes of rainfall and river discharge in northern South America and the El Nino phenomenon
Holozane Niederschlagsund Abflufi anderungen im nordlichen Siidamerika und das El Nino Phanomen Die Zeitraume mit niedrigen Hochwasserstanden im unteren Magdalena Cauca San Jorge-Gebiet, wie sie durch die horizontale Ausdehnung von Torflagen (bzw. die Haufigkeit datierter Torflagen in Bohrprofilen) zu rekon struieren sind, stimmen gut mit den datierten Perioden niedriger Seewasserstande in den nordlichen Anden uber ein. Trotz einiger lokaler Unte…
Palaeoecology and stratigraphy of the lateglacial type section at Usselo (the Netherlands)
Artefactos líticos de abrigos rocosos en
En el curso de excavaciones preliminares efectuadas en los abrigos rocosos de "El Abra" (Rocas de Sevilla) entre Zipaquirá y Tocancipá, Sabana de Bogotá, Departamento de Cundinamarca, Colombia, alt. 2570 metros, se encontraron artefactos de piedra hasta una profundidad de más de 200 cm. El nivel entre 150 y 175 centímetros, que contiene artefactos y fragmentos de carbón vegetal, ha sido fechado por Carbón 14, dando una cronología de 12.400 años A…
Las terrazas del río Magdalena y la posición estratigráfica de los hallazgos de Garzón
A critical study of the Pleistocene lake and terrace deposits in Colombia leads to the result, that, during the Quaternary, the climatic fluctuations in this country were the same as in Europe and in Northamerica, with the only exception that the glacial periods were also of high atmospheric precipitation. The presence of a lime crust in the 45 m. terrace near Aipe (fig. 2) indicates that the terrace sediments were deposited during a wetter clima…
Artefactos líticos de abrigos rocosos en
En el curso de excavaciones preliminares efectuadas en los abrigos rocosos de "El Abra" (Rocas de Sevilla) entre Zipaquirá y Tocancipá, Sabana de Bogotá, Departamento de Cundinamarca, Colombia, alt. 2570 metros, se encontraron artefactos de piedra hasta una profundidad de más de 200 cm. El nivel entre 150 y 175 centímetros, que contiene artefactos y fragmentos de carbón vegetal, ha sido fechado por Carbón 14, dando una cronología de 12.400 años A…
Las terrazas del río Magdalena y la posición estratigráfica de los hallazgos de Garzón
A critical study of the Pleistocene lake and terrace deposits in Colombia leads to the result, that, during the Quaternary, the climatic fluctuations in this country were the same as in Europe and in Northamerica, with the only exception that the glacial periods were also of high atmospheric precipitation. The presence of a lime crust in the 45 m. terrace near Aipe (fig. 2) indicates that the terrace sediments were deposited during a wetter clima…
Las terrazas del río Magdalena y la posición estratigráfica de los hallazgos de Garzón
A critical study of the Pleistocene lake and terrace deposits in Colombia leads to the result, that, during the Quaternary, the climatic fluctuations in this country were the same as in Europe and in Northamerica, with the only exception that the glacial periods were also of high atmospheric precipitation. The presence of a lime crust in the 45 m. terrace near Aipe (fig. 2) indicates that the terrace sediments were deposited during a wetter clima…
Artefactos líticos de abrigos rocosos en
En el curso de excavaciones preliminares efectuadas en los abrigos rocosos de "El Abra" (Rocas de Sevilla) entre Zipaquirá y Tocancipá, Sabana de Bogotá, Departamento de Cundinamarca, Colombia, alt. 2570 metros, se encontraron artefactos de piedra hasta una profundidad de más de 200 cm. El nivel entre 150 y 175 centímetros, que contiene artefactos y fragmentos de carbón vegetal, ha sido fechado por Carbón 14, dando una cronología de 12.400 años A…
Palaeoecology and stratigraphy of the lateglacial type section at Usselo (the Netherlands)
Holocene changes of rainfall and river discharge in northern South America and the El Nino phenomenon
Holozane Niederschlagsund Abflufi anderungen im nordlichen Siidamerika und das El Nino Phanomen Die Zeitraume mit niedrigen Hochwasserstanden im unteren Magdalena Cauca San Jorge-Gebiet, wie sie durch die horizontale Ausdehnung von Torflagen (bzw. die Haufigkeit datierter Torflagen in Bohrprofilen) zu rekon struieren sind, stimmen gut mit den datierten Perioden niedriger Seewasserstande in den nordlichen Anden uber ein. Trotz einiger lokaler Unte…
The Pliocene and Quaternary of the high plain of Bogotá (Colombia)
Paleoenvironmental Changes and Glacial Stades of the Last 50,000 Years in the Cordillera Central, Colombia
Using data from glacial geomorphology, tephra-soil stratigraphy and mineralogy, palynology, and radiocarbon dating, a sequence of glacial and bioclimatic stades and interstades has been identified for the past ca. 50,000 yr in the Ruı́z-Tolima massif, Cordillera Central. Six cold stades separated by warmer interstades occurred before 48,000, between 48,000 and 33,000, between 28,000 and 21,000, from ≥16,000 to ca. 14,000, ca. 13,000–12,400, and c…
Vegetation disturbance and human population in Colombia - a regional reconstruction
Palaeoecologists using pollen to map vegetation since the last ice age have noted numerous changes - which they feel increasingly obliged to blame on humans. These changes, such as deforestation or the dominance of certain plants, may happen suddenly or take place over thousands of years. The authors study the pollen record in Colombia, identify plants diagnostic of cultivation or disturbed ground ("degraded vegetation") and use them to map human…
Geography (4 works) · Geological and Tectonic Studies in Latin America (4 works) · Geology (4 works) · Geology (4 works) · Physical geography (4 works) · Environmental and Cultural Studies in Latin America and Beyond (3 works) · Geomorphology (3 works) · Paleontology (3 works) · Paleontology (3 works) · Biology (2 works)