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  • PANGAEA  (6,798)
  • Blackwell Publishing Ltd
  • 2000-2004  (9,272)
  • 1945-1949
  • 2001  (9,272)
Collection
Keywords
Publisher
Years
  • 2000-2004  (9,272)
  • 1945-1949
Year
  • 1
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    The last occurrence of Proboscia curvirostris in the North Atlantic marine isotope stage 9-8 (2001)
    PANGAEA
    In:  Supplement to: Koç, Nalân; Labeyrie, Laurent D; Manthé, Sandrine; Flower, Benjamin P; Hodell, David A; Aksu, Ali E (2001): The last occurrence of Proboscia curvirostris in the North Atlantic marine isotope stages 9-8. Marine Micropaleontology, 41(1-2), 9-23, https://doi.org/10.1016/S0377-8398(00)00054-2
    Details
    Publication Date: 2024-06-26
    Description: Well-preserved diatoms are present in high sedimentation rate Pleistocene cores retrieved on Ocean Drilling Program (ODP) Legs 151, 152, 162 and IMAGES cruises of R/V Marion Dufresne from the North Atlantic. Investigation of the stratigraphic occurrence of diatom species shows that the youngest diatom event observed in the area is the last occurrence (LO) of Proboscia curvirostris (Jousé) Jordan and Priddle. P. curvirostris is a robust species that can easily be identified in the sediments, and therefore can be a practical biostratigraphic tool. We have mapped its areal distribution, and found that it stretches from 40°N to 80°N in the North Atlantic. Further, we have correlated the LO P. curvirostris to the oxygen isotope records of six cores to refine the age of this biostratigraphic event. The extinction of P. curvirostris is latitudinally diachronous through Marine Isotope Stages (MIS) 9 to 8 within the North Atlantic. This is closely related to the paleoceanography of the area. P. curvirostris first disappeared within interglacial MIS 9 (324 ka) from the northern areas that are most sensitive to climatic forcing, like the East Greenland current and the sea-ice margin. It survived in mid-North Atlantic until the conditions of the MIS 8 (glaciation) became too severe (260 ka). In the North Pacific at ODP Site 883 the LO P. curvirostris falls within MIS 8. The observed overlap in age between the North Atlantic and the North Pacific strongly suggests that the extinction of P. curvirostris is synchronous between these oceans.
    Keywords: 152-919A; 162-983A; CALYPSO; Calypso Corer; DRILL; Drilling/drill rig; Greenland Sea; Iceland; IMAGES I; Joides Resolution; Leg152; Leg162; Marion Dufresne (1995); MD101; MD952014; MD95-2014; MD952027; MD95-2027; Newfoundland Slope; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: application/zip, 6 datasets
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  • 2
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    Age determinations and sedimentology on cores GIK17940 and 184-1144 (2001)
    PANGAEA
    In:  Supplement to: Bühring, Christian (2001): East Asian Monsoon variability on orbital- and millennial-to-sub-decadal time scales. PhD Thesis, Mathematisch-Naturwissenschaftliche Fakultät der Christian-Albrechts-Universität zu Kiel, Germany, 164 pp, urn:nbn:de:gbv:8-diss-5231
    Details
    Publication Date: 2024-06-26
    Description: Sedimentological, geochemical and paleomagnetic records were employed to reconstruct the history of East Asian Monsoon variability in the South China Sea (SCS) on orbital- and millennial-to-sub-decadal time scales. A detailed magnetostratigraphy for the southern central SCS was established as well as a stable isotope stratigraphy for ODP Site 1144 for the last 1.2 million years in the northern South China Sea. Furthermore a volcanic tephra layer from the southern central SCS could be identified as the Youngest Toba Ash, which thus re-presents an important age marker and was used to reconstruct paleo wind directions during the eruption 74 ka. Special attention was paid to the high- and ultrahigh-frequency variability in the last glacial-interglacial cycle and the Holocene, and to a precise age control of climate changes in general.
    Keywords: 184-1144; 184-1144A; COMPCORE; Composite Core; DRILL; Drilling/drill rig; GIK/IfG; GIK17940-2; Gravity corer (Kiel type); Institute for Geosciences, Christian Albrechts University, Kiel; Joides Resolution; Leg184; MONITOR MONSUN; SL; SO95; Sonne; South China Sea
    Type: Dataset
    Format: application/zip, 7 datasets
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    DATA PANGAEA
  • 3
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    Shell preservation of Limacina inflata in surface sediments of the Central and South Atlantic (2001)
    PANGAEA
    In:  Supplement to: Gerhardt, Sabine; Henrich, Rüdiger (2001): Shell preservation of Limacina inflata (Pteropoda) in surface sediments from the Central and South Atlantic Ocean: a new proxy to determine the aragonite saturation state of water masses. Deep Sea Research Part I: Oceanographic Research Papers, 48(9), 2051-2071, https://doi.org/10.1016/S0967-0637(01)00005-X
    Details
    Publication Date: 2024-06-26
    Description: Over 300 surface sediment samples from the Central and South Atlantic Ocean and the Caribbean Sea were investigated for the preservation state of the aragonitic test of Limacina inflata. Results are displayed in spatial distribution maps and are plotted against cross-sections of vertical water mass configurations, illustrating the relationship between preservation state, saturation state of the overlying waters, and overall water mass distribution. The microscopic investigation of L. inflata (adults) yielded the Limacina dissolution index (LDX), and revealed three regional dissolution patterns. In the western Atlantic Ocean, sedimentary preservation states correspond to saturation states in the overlying waters. Poor preservation is found within intermediate water masses of southern origin (i.e. Antarctic intermediate water (AAIW), upper circumpolar water (UCDW)), which are distinctly aragonite-corrosive, whereas good preservation is observed within the surface waters above and within the upper North Atlantic deep water (UNADW) beneath the AAIW. In the eastern Atlantic Ocean, in particular along the African continental margin, the LDX fails in most cases (i.e. less than 10 tests of L. inflata per sample were found). This is most probably due to extensive “metabolic” aragonite dissolution at the sediment-water interface combined with a reduced abundance of L. inflata in the surface waters. In the Caribbean Sea, a more complex preservation pattern is observed because of the interaction between different water masses, which invade the Caribbean basins through several channels, and varying input of bank-derived fine aragonite and magnesian calcite material. The solubility of aragonite increases with increasing pressure, but aragonite dissolution in the sediments does not simply increase with water depth. Worse preservation is found in intermediate water depths following an S-shaped curve. As a result, two aragonite lysoclines are observed, one above the other. In four depth transects, we show that the western Atlantic and Caribbean LDX records resemble surficial calcium carbonate data and delta13C and carbonate ion concentration profiles in the water column. Moreover, preservation of L. inflata within AAIW and UCDW improves significantly to the north, whereas carbonate corrosiveness diminishes due to increased mixing of AAIW and UNADW. The close relationship between LDX values and aragonite contents in the sediments shows much promise for the quantification of the aragonite loss under the influence of different water masses. LDX failure and uncertainties may be attributed to (1) aragonite dissolution due to bottom water corrosiveness, (2) aragonite dissolution due to additional CO2 release into the bottom water by the degradation of organic matter based on an enhanced supply of organic matter into the sediment, (3) variations in the distribution of L. inflata and hence a lack of supply into the sediment, (4) dilution of the sediments and hence a lack of tests of L. inflata, or (5) redeposition of sediment particles.
    Keywords: 06MT15_2; 06MT41_3; A240-ML; Amazon Fan; Angola Basin; Argentine Basin; Ascencion Island; AT_II-107_65; ATII_USA; Atlantic Ocean; Atlantis II (1963); BCR; Box corer (Reineck); Brazil Basin; Cape Basin; Ceara Rise; Continental slope off Brazil; Continental Slope off Rio Paraiba do Sul; East Brazil Basin; eastern Abrolhos Bank; Eastern Rio Grande Rise; Equatorial Atlantic; GeoB1000-1; GeoB1001-1; GeoB1004-2; GeoB1006-2; GeoB1008-6; GeoB1009-3; GeoB1010-3; GeoB1011-2; GeoB1012-1; GeoB1013-2; GeoB1014-2; GeoB1015-2; GeoB1015-3; GeoB1016-2; GeoB1017-3; GeoB1018-2; GeoB1019-2; GeoB1020-1; GeoB1021-3; GeoB1022-3; GeoB1023-2; GeoB1024-3; GeoB1025-2; GeoB1026-3; GeoB1027-2; GeoB1028-2; GeoB1029-1; GeoB1030-3; GeoB1033-3; GeoB1034-1; GeoB1035-2; GeoB1035-3; GeoB1036-3; GeoB1037-1; GeoB1039-1; GeoB1040-3; GeoB1041-1; GeoB1043-2; GeoB1044-3; GeoB1046-2; GeoB1047-3; GeoB1048-2; GeoB1101-4; GeoB1102-3; GeoB1103-3; GeoB1104-5; GeoB1106-5; GeoB1108-6; GeoB1109-4; GeoB1110-3; GeoB1111-5; GeoB1112-3; GeoB1113-7; GeoB1115-4; GeoB1116-1; GeoB1117-3; GeoB1118-2; GeoB1119-2; GeoB1120-3; GeoB1203-2; GeoB1206-1; GeoB1207-2; GeoB1208-1; GeoB1209-1; GeoB1210-3; GeoB1211-1; GeoB1213-2; GeoB1215-1; GeoB1216-2; GeoB1217-1; GeoB1218-1; GeoB1220-2; GeoB1306-1; GeoB1307-2; GeoB1308-1; GeoB1309-3; GeoB1310-1; GeoB1311-2; GeoB1312-1; GeoB1313-1; GeoB1314-2; GeoB1315-2; GeoB1401-1; GeoB1403-2; GeoB1404-8; GeoB1406-1; GeoB1414-2; GeoB1415-1; GeoB1417-2; GeoB1418-1; GeoB1419-1; GeoB1420-1; GeoB1421-1; GeoB1501-1; GeoB1506-1; GeoB1508-1; GeoB1511-6; GeoB1512-1; GeoB1513-2; GeoB1516-1; GeoB1522-1; GeoB1523-2; GeoB1612-9; GeoB1701-2; GeoB1702-7; GeoB1703-3; GeoB1704-1; GeoB1707-2; GeoB1713-6; GeoB1715-1; GeoB1717-2; GeoB1718-1; GeoB1724-4; GeoB1726-1; GeoB1726-2; GeoB1728-3; GeoB1729-1; GeoB1901-1; GeoB1903-3; GeoB1904-1; GeoB1906-1; GeoB1907-1; GeoB2002-2; GeoB2003-1; GeoB2004-1; GeoB2016-3; GeoB2018-1; GeoB2019-2; GeoB2021-4; GeoB2022-3; GeoB2102-1; GeoB2104-1; GeoB2108-1; GeoB2109-3; GeoB2111-2; GeoB2112-1; GeoB2116-2; GeoB2117-4; GeoB2118-1; GeoB2119-1; GeoB2119-2; GeoB2122-1; GeoB2123-1; GeoB2124-1; GeoB2125-2; GeoB2126-1; GeoB2127-1; GeoB2130-1; GeoB2201-1; GeoB2202-4; GeoB2202-5; GeoB2204-1; GeoB2205-4; GeoB2206-1; GeoB2207-2; GeoB2208-1; GeoB2212-1; GeoB2213-1; GeoB2215-8; GeoB2216-2; GeoB2801-1; GeoB2802-2; GeoB2803-1; GeoB2804-2; GeoB2805-1; GeoB2806-6; GeoB2807-1; GeoB2808-3; GeoB2812-3; GeoB2813-1; GeoB2814-3; GeoB2817-3; GeoB2818-1; GeoB2819-2; GeoB2820-1; GeoB2821-2; GeoB2822-3; GeoB2824-1; GeoB2825-3; GeoB2826-1; GeoB2827-2; GeoB2828-1; GeoB2829-3; GeoB2830-1; GeoB2903-1; GeoB2904-11; GeoB2905-1; GeoB2906-3; GeoB2907-1; GeoB2908-8; GeoB2909-1; GeoB2910-2; GeoB2911-2; GeoB3108-4; GeoB3116-1; GeoB3117-3; GeoB3118-1; GeoB3119-1; GeoB3131-2; GeoB3137-1; GeoB3138-2; GeoB3149-2; GeoB3150-1; GeoB3151-2; GeoB3167-1; GeoB3168-1; GeoB3174-1; GeoB3177-2; GeoB3201-2; GeoB3202-2; GeoB3203-3; GeoB3205-1; GeoB3206-2; GeoB3207-2; GeoB3208-2; GeoB3209-2; GeoB3211-1; GeoB3216-1; GeoB3216-2; GeoB3217-1; GeoB3218-1; GeoB3219-1; GeoB3220-2; GeoB3221-1; GeoB3227-1; GeoB3228-2; GeoB3229-1; GeoB3230-4; GeoB3231-2; GeoB3232-3; GeoB3233-1; GeoB3236-2; GeoB3237-1; GeoB3702-2; GeoB3703-4; GeoB3704-2; GeoB3705-2; GeoB3706-3; GeoB3707-3; GeoB3708-1; GeoB3709-1; GeoB3710-1; GeoB3711-1; GeoB3712-1; GeoB3713-1; GeoB3807-1; GeoB3826-2; GeoB3910-3; GeoB3911-1; GeoB3912-1; GeoB3912-2; GeoB4305-1; GeoB4313-1; GeoB4314-2; GeoB4315-1; GeoB4401-3; GeoB4407-2; GeoB4411-1; GeoB4414-2; GeoB4418-2; GeoB4420-1; GeoB4421-2; GeoB5002-1; GeoB5004-2; GeoB5006-1; GeoB5007-1; GeoB5008-3; GeoB5110-5; GeoB5112-5; GeoB5115-2; GeoB5116-1; GeoB5117-2; GeoB5120-1; GeoB5121-2; GeoB5130-1; GeoB5132-2; GeoB5133-3; GeoB5134-1; GeoB5135-1; GeoB5136-2; GeoB5137-1; GeoB5138-2; GeoB5139-1; GeoB5140-3; GeoB5142-2; Giant box corer; GIK17836-1; GIK17851-1; GIK17866-1; GIK17884-1; GKG; Gravity corer (Kiel type); Guayana continental slope; Guinea Basin; Hunter Channel; JOPSII-6; JOPSII-8; Kongo delta; Kongo sediment fan; M12/1; M15/2; M16/1; M16/2; M20/1; M20/2; M23/1; M23/2; M23/3; M29/2; M29/3; M34/2; M34/3; M34/4; M35/1; M35002-1; M35003-6; M35004-1; M35005-3; M35006-6; M35008-1; M35010-2; M35012-6; M35013-3; M35014-1; M35015-1; M35018-1; M35019-1; M35020-2; M35023-3; M35024-6; M35025-1; M35026-2; M35030-1; M35031-2; M35033-1; M35034-3; M35035-1; M35039-1; M35052-5; M35053-3; M35054-1; M38/1; M38/2; M41/2; M41/3; M6/6; M9/4; Meteor (1986); MIC; Midatlantic Ridge; Mid Atlantic Ridge; Mid-Atlantic Ridge; MiniCorer; MUC; MultiCorer; Multiple revolver box corer; Namibia Continental Margin; Namibia continental slope; NE-Brazilian continental margin; Niger Sediment Fan; Northeast Brasilian Margin; Northern Brasil-Basin; Northern Cape Basin; Northern Guinea Basin; Northern Rio Grande Rise; Northwestern Vema Channel; off Kunene; off Macaé; off Rio Doce; off Rio Paraiba do Sul; PC; Piston corer; RC11; RC1112; RC11-21; RC11-26; Rio Grande Rise; RKG; Robert Conrad; Romanche fracture zone; Santos Plateau; SFB261; Sierra Leone Rise; SL; SO84; Sonne; South African margin; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; south of Abrolhos Bank; South of Cape Verde Islands; ST. HELENA HOTSPOT; Uruguay continental margin; V15; V15-157; V20; V20-227; V20-228; V22; V22-38; V24; V24-237; V24-240; V25; V25-56; V26; V26-63; V26-82; van Veen Grab; Vema; VGRAB; Victor Hensen; Walvis Ridge; West Angola Basin; Western Equatorial Atlantic
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 4
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    Ikaite of sediment cores from the Zaire deep-sea fan (2001)
    PANGAEA
    In:  Supplement to: Zabel, Matthias; Schulz, Horst D (2001): Importance of submarine landslides for non-steady state conditions in pore water systems - lower Zaire (Congo) deep-sea fan. Marine Geology, 176(1-4), 87-99, https://doi.org/10.1016/S0025-3227(01)00164-5
    Details
    Publication Date: 2024-06-26
    Description: Most concentration profiles of sulfate in continental margin sediments show constant or continuously increasing gradients from the benthic boundary layer down to the deep sulfate reduction zone. However, a very marked change in this gradient has been observed several meters below the surface at many locations, which has been attributed to anoxic sulfide oxidation or to non-local transport mechanisms of pore waters. The subject of this study is to investigate whether this feature could be better explained by non-steady state conditions in the pore-water system. To this end, data are presented from two gravity cores recovered from the Zaire deep-sea fan. The sediments at this location can be subdivided into two sections. The upper layer, about 10 m thick, consists of stratified pelagic deposits representing a period of continuous sedimentation over the last 190 kyr. It is underlain by a turbidite sequence measuring several meters in thickness, which contains large crystals of authigenic calcium carbonate (ikaite: CaCO3·6H2O). Ikaite delta13C values are indicative of a methane carbon contribution to the CO2 pool. Radiocarbon ages of these minerals, as well as of the adjacent bulk sediments, provide strong evidence that the pelagic sediments have overthrust the lower section as a coherent block. Therefore, the emplacement of a relatively undisturbed sediment package is postulated. Pore-water profiles show the depth of the sulfate–methane transition zone within the turbiditic sediments. By the adaptation of a simple transport-reaction model, it is shown that the change in the geochemical environmental conditions, resulting from this slide emplacement, and the development towards a new steady state are fully sufficient to explain all features related to the pore-water profiles, particularly, [SO4]2- and dissolved inorganic carbon (DIC). The model shows that the downslope transport took place about 300 yr ago.
    Keywords: Congo Fan; GeoB; GeoB1401-4; GeoB4914-3; Geosciences, University of Bremen; Gravity corer (Kiel type); M16/1; M41/1; Meteor (1986); SL; southern Congo fan
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 5
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    Sea-surface temperature reconstruction of the South China Sea (2001)
    PANGAEA
    In:  Supplement to: Kienast, Markus; Steinke, Stephan; Stattegger, Karl; Calvert, Stephen E (2001): Synchronous tropical South China Sea SST change and Greenland warming during deglaciation. Science, 291(5511), 2132-2134, https://doi.org/10.1126/science.1057131
    Details
    Publication Date: 2024-06-26
    Description: The tropical ocean plays a major role in global climate. It is therefore crucial to establish the precise phase between tropical and high-latitude climate variability during past abrupt climate events in order to gain insight into the mechanisms of global climate change. Here we present alkenone sea surface temperature (SST) records from the tropical South China Sea that show an abrupt temperature increase of at least 1°C at the end of the last glacial period. Within the recognized dating uncertainties, this SST increase is synchronous with the Bølling warming observed at 14.6 thousand years ago in the Greenland Ice Sheet Project 2 ice core.
    Keywords: GIK18252-3; GIK18287-3; Gravity corer (Kiel type); SL; SO115; SO115_05; SO115_40; Sonne; SUNDAFLUT; Sunda Shelf; Vietnam shelf
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 6
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    Age model of sediment core PS1458-1 (2001)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age, comment; Age model; Age model, paleomagnetic; ANT-IV/4; AWI_Paleo; DEPTH, sediment/rock; Gravity corer (Kiel type); Maud Rise; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS08; PS08/617; PS1458-1; SL
    Type: Dataset
    Format: text/tab-separated-values, 16 data points
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  • 7
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    Age model of sediment core PS1467-1 (2001)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age, comment; Age model; Age model, paleomagnetic; ANT-IV/4; AWI_Paleo; KL; Maud Rise; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS08; PS08/649; PS1467-1
    Type: Dataset
    Format: text/tab-separated-values, 28 data points
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  • 8
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    Age model of sediment core PS1451-1 (2001)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age, comment; Age model; Age model, paleomagnetic; ANT-IV/4; AWI_Paleo; Gravity corer (Kiel type); Maud Rise; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS08; PS08/564; PS1451-1; SL
    Type: Dataset
    Format: text/tab-separated-values, 18 data points
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  • 9
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    Isotopes, TOC, CaCO3 of sediment core GeoB4242-5 (2001)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Agadir Canyon; Calcium carbonate; Calculated from mass/volume; Canary Islands Azores Gibraltar Observations; CANIGO; Carbon, organic, total; Density, dry bulk; Density, wet bulk; Depth, composite; DEPTH, sediment/rock; Depth correlation/correction; Element analyser CHN, LECO, salinity corrected; GeoB; GeoB4242-5; Geology, comment; Geosciences, University of Bremen; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gravity corer (Kiel type); M37/1; Mass spectrometer Finnigan MAT 251; Meteor (1986); Porosity; SL
    Type: Dataset
    Format: text/tab-separated-values, 620 data points
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  • 10
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    Isotopes, TOC, CaCO3 of sediment core GeoB4241-11 (2001)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Agadir Canyon; Calcium carbonate; Calculated from mass/volume; Canary Islands Azores Gibraltar Observations; CANIGO; Carbon, organic, total; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Density, dry bulk; Density, wet bulk; Depth, composite; DEPTH, sediment/rock; Depth correlation/correction; Element analyser CHN, LECO, salinity corrected; GeoB; GeoB4241-11; Geology, comment; Geosciences, University of Bremen; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gravity corer (Kiel type); M37/1; Mass spectrometer Finnigan MAT 251; Meteor (1986); Porosity; SL
    Type: Dataset
    Format: text/tab-separated-values, 570 data points
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