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| Autores principales: | , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
1974
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| Materias: | |
| Acceso en línea: | https://doi.org/10.1594/PANGAEA.509896 |
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| _version_ | 1867167944081932288 |
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| author | Einsele, Gerhard Herm, D Schwarz, Hans Joachim |
| author_facet | Einsele, Gerhard Herm, D Schwarz, Hans Joachim |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | In an area regarded to be very favourable for the study of Holocene sea level changes one or several eustatic (?) oscillations of sea have been found using sedimentological and ecological methods. After a maximum of +3 m during the Nouakchottian stage (= Middle Flandrian or Late Atlantic) about 5500 YBP a drop of sea to -3.5 ± 0.5 m about 4100 YBP is testified by stromatolitic algae indicating the former sea level within the tidal zone with high accuracy. This evidence is supported by the observation of post-Nouakchottian regressive and transgressive geologic sequences, by buried beach deposits and flooded hardgrounds, post-Nouakchottian marine terraces of different height and age, the cutting off of one large and several small bays from the open sea etc. Possibly, one or two smaller oscillations followed between 4000 and 1500 years B. P. The radiocarbon age of the marine shells dated may be partly somewhat too old or too young. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_509896 |
| institution | PANGAEA |
| language | en |
| publishDate | 1974 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age determination of Holozene marine deposites from the western Mauritania (Table 1) Einsele, Gerhard Herm, D Schwarz, Hans Joachim Africa, Mauritania; Age, 14C conventional; Age, comment; Age, dated; Age, dated, standard deviation; Age, dated material; Comment; DEPTH, sediment/rock; Event label; Isotope ratio mass spectrometry; Latitude of event; Longitude of event; M25; M25_L10; M25_L11; M25_L12; M25_L19; M25_L2; M25_L24; M25_L26; M25_L29; M25_L3; M25_L39; M25_L46; M25_L7; Meteor (1964); PROFILE; Profile sampling; Sample code/label; δ13C; δ18O In an area regarded to be very favourable for the study of Holocene sea level changes one or several eustatic (?) oscillations of sea have been found using sedimentological and ecological methods. After a maximum of +3 m during the Nouakchottian stage (= Middle Flandrian or Late Atlantic) about 5500 YBP a drop of sea to -3.5 ± 0.5 m about 4100 YBP is testified by stromatolitic algae indicating the former sea level within the tidal zone with high accuracy. This evidence is supported by the observation of post-Nouakchottian regressive and transgressive geologic sequences, by buried beach deposits and flooded hardgrounds, post-Nouakchottian marine terraces of different height and age, the cutting off of one large and several small bays from the open sea etc. Possibly, one or two smaller oscillations followed between 4000 and 1500 years B. P. The radiocarbon age of the marine shells dated may be partly somewhat too old or too young. |
| title | Age determination of Holozene marine deposites from the western Mauritania (Table 1) |
| topic | Africa, Mauritania; Age, 14C conventional; Age, comment; Age, dated; Age, dated, standard deviation; Age, dated material; Comment; DEPTH, sediment/rock; Event label; Isotope ratio mass spectrometry; Latitude of event; Longitude of event; M25; M25_L10; M25_L11; M25_L12; M25_L19; M25_L2; M25_L24; M25_L26; M25_L29; M25_L3; M25_L39; M25_L46; M25_L7; Meteor (1964); PROFILE; Profile sampling; Sample code/label; δ13C; δ18O |
| url | https://doi.org/10.1594/PANGAEA.509896 |