Einsele, Gerhard; Herm, D; Schwarz, Hans Joachim (1974): Age determination of Holozene marine deposites from the western Mauritania (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.509896, Supplement to: Einsele, G et al. (1974): Holocene eustatic (?) sea level fluctuation at the coast of Mauritania. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C18, 43-62
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Abstract:
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.
Coverage:
Median Latitude: 19.248333 * Median Longitude: -16.175000 * South-bound Latitude: 18.080000 * West-bound Longitude: -16.500000 * North-bound Latitude: 20.000000 * East-bound Longitude: -15.600000
Date/Time Start: 1971-04-28T00:00:00 * Date/Time End: 1971-04-28T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 2 m
Event(s):
M25_L2 * Latitude: 19.100000 * Longitude: -16.150000 * Date/Time: 1971-04-28T00:00:00 * Location: Africa, Mauritania * Campaign: M25 * Basis: Meteor (1964) * Method/Device: Profile sampling (PROFILE)
M25_L3 * Latitude: 20.000000 * Longitude: -16.200000 * Date/Time: 1971-04-28T00:00:00 * Location: Africa, Mauritania * Campaign: M25 * Basis: Meteor (1964) * Method/Device: Profile sampling (PROFILE)
M25_L7 * Latitude: 19.380000 * Longitude: -16.500000 * Date/Time: 1971-04-28T00:00:00 * Location: Africa, Mauritania * Campaign: M25 * Basis: Meteor (1964) * Method/Device: Profile sampling (PROFILE)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 5 | Sample code/label | Sample label | Einsele, Gerhard | |||
| 6 | Age, dated | Age dated | ka | Einsele, Gerhard | Age, 14C conventional | |
| 7 | Age, dated standard deviation | Age dated std dev | ± | Einsele, Gerhard | ||
| 8 | δ13C | δ13C | ‰ PDB | Einsele, Gerhard | Isotope ratio mass spectrometry | |
| 9 | δ18O | δ18O | ‰ | Einsele, Gerhard | Isotope ratio mass spectrometry | Refer to Solnhofen limestone |
| 10 | Age, comment | Comm | Einsele, Gerhard | tentative corrections to apply to the 14C dates yr | ||
| 11 | Age, dated material | Dated material | Einsele, Gerhard | |||
| 12 | Comment | Comment | Einsele, Gerhard |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
148 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Depth sed [m] | 5 Sample label | 6 Age dated [ka] | 7 Age dated std dev [±] | 8 δ13C [‰ PDB] | 9 δ18O [‰] | 10 Comm | 11 Dated material | 12 Comment |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M25_L10 | 19.46 | -16.30 | 0 | KI-566 | 3.89 | 0.095 | Kjoekkenmoeddinger on top of sand dune: Arca senilis | after Elouard 4270 YBP | |||
| M25_L10 | 19.46 | -16.30 | 0 | KI-593 | 2.10 | 0.080 | 0.5 | 6.80 | 150 | buried beach: Cardium, Lucina, Tellina, Bittium, Turritella, Hydrobia, Marginella, Crepidula, Tapes, Dosinia | 2 samples put together |
| M25_L10 | 19.46 | -16.30 | 2 | KI-567 | 4.55 | 0.075 | 1.3 | 9.80 | 250 | from boring 2 m below surface of lower terrace: Arca senilis | |
| M25_L11 | 19.47 | -16.32 | 0 | KI-570 | 3.20 | 0.085 | 2.2 | 9.40 | 400 | buried beach: Lucina, Donax, Tapes, Bittium, Turritella, Bullaria | |
| M25_L11 | 19.47 | -16.32 | 0 | KI-572 | 3.05 | 0.065 | 2.5 | 9.10 | 400 | shell bed below beach deposit: Lucina, Bullaria | |
| M25_L11 | 19.47 | -16.32 | 0 | KI-571 | 2.72 | 0.085 | 1.5 | 7.40 | 250 | shell bed below beach deposit: Lucina, Turritella, marginella, Bullaria | |
| M25_L11 | 19.47 | -16.32 | 0 | KI-568 | 4.83 | 0.075 | hardground: Arca, single valves | ||||
| M25_L11 | 19.47 | -16.32 | 0 | KI-569 | 4.47 | 0.065 | -3.0 | 5.10 | -150 | buried shell bed: Arca, bivalved insitu | |
| M25_L12 | 19.53 | -16.28 | 0 | KI-594 | 4.80 | 0.470 | -0.5 | 2.90 | 50 | buried beach and foreshore: Cardium, Bittium, Cerithium, Arca, Marginella, Bullaria, Ostrea | too less material, determination inexact |
| M25_L12 | 19.53 | -16.28 | 0 | KI-573 | 3.66 | 0.075 | 1.3 | 7.50 | 250 | hardground under fine sand: Ostrea stentina | |
| M25_L19 | 19.71 | -16.32 | 0 | KI-592 | 0.00 | -1.2 | 7.30 | none | Arca senilis | 14Cactivity 120.5 +- 0.5% | |
| M25_L2 | 19.10 | -16.15 | 0 | KI-564 | 3.95 | 0.130 | -0.6 | 5.80 | 50 | shell bed at foot of lowest Nouakchottian terrace: Arca, Lucina, Bullaria | |
| M25_L24 | 19.55 | -16.30 | 0 | KI-575 | 1.53 | 0.075 | 1.2 | 8.40 | 250 | buried shell bed under mud and stromatolites: Cardium, Lucina, Turritella | |
| M25_L26 | 19.50 | -16.36 | 0 | KI-576 | 5.11 | 0.095 | -1.9 | 5.30 | -150 | buried shell bed at foot of Nouakch, terrace: Arca, Cardium | |
| M25_L29 | 18.80 | -15.60 | 0 | KI-579 | 4.59 | 0.085 | 1.4 | 8.50 | 250 | buried shell bed under varved gypsum: Cardium, Tapes | mean of 2 samples 4680 +- 70 YBP |
| M25_L29 | 18.80 | -15.60 | 0 | 4.83 | 0.110 | ||||||
| M25_L3 | 20.00 | -16.20 | 0 | KI-577 | 0.00 | -0.6 | 8.60 | none | Arca | mean of 2 samples: 14C activity 108.7 +- 0.5% | |
| M25_L39 | 18.40 | -15.75 | 0 | KI-580 | 5.31 | 0.070 | 0.0 | 6.90 | 100 | buried shell bed under hardground: Cardium, Lucina, Bullaria | |
| M25_L39 | 18.40 | -15.75 | 0 | KI-581 | 4.30 | 0.120 | 0.6 | 8.40 | 150 | buried hardground: Cardium, Lucina, Tapes, Bittium, Turritella | |
| M25_L39 | 18.40 | -15.75 | 0 | KI-663 | 3.07 | 0.085 | 4.5 | 4.00 | (400)? | buried calcareous stromatolites between hardground and varved gypsum | probably too young because of CaCO3-cement |
| M25_L46 | 18.08 | -16.02 | 1 | KI-735 | 6.02 | 0.060 | -0.5 | 6.80 | 50 | from boring, 1m below surface of small sabkha: Arca senilis | |
| M25_L7 | 19.38 | -16.50 | 0 | KI-565 | 2.00 | 0.045 | 1.8 | 8.80 | 300 | hardground in lagoon: Ostrea stentina |