cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.147450
title: Tree-ring width of Quercus species from historical object sample 5911B/12A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 113; first year: 1411; end year: 1524; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 9; Last ring under bark: absent
DOI: 10.1594/pangaea.147871
title: Tree-ring width of Quercus species from historical object sample 5682B/08A, Netherlands, Enkhuizen

description: Species: Quercus species; No of rings: 50; first year: 1411; end year: 1461; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 16; Last ring under bark: present
DOI: 10.1594/pangaea.147873
title: Tree-ring width of Quercus species from historical object sample 5682B/06A, Netherlands, Enkhuizen

description: Species: Quercus species; No of rings: 90; first year: 1361; end year: 1451; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 16; Last ring under bark: present
DOI: 10.1594/pangaea.148589
title: Tree-ring width of Quercus species from historical object sample 2146B/18A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 95; first year: 1175; end year: 1270; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 1; Last ring under bark: absent
DOI: 10.1594/pangaea.146890
title: Tree-ring width of Quercus species from historical object sample 6048B/03M, Netherlands, Bronckhorst

description: Species: Quercus species; No of rings: 65; first year: 1201; end year: 1266; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147241
title: Tree-ring width of Quercus species from historical object sample 5949B/05A, Netherlands, Winterswijk

description: Species: Quercus species; No of rings: 92; first year: 1536; end year: 1628; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 3; Last ring under bark: absent
DOI: 10.1594/pangaea.146908
title: Tree-ring width of Quercus species from historical object sample 6044B/01A, Netherlands, Leiden

description: Species: Quercus species; No of rings: 59; first year: 1406; end year: 1465; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147341
title: Tree-ring width of Quercus species from historical object sample 5926B/08A, Netherlands, 's-Hertogenbosch

description: Species: Quercus species; No of rings: 76; first year: 1488; end year: 1564; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 16; Last ring under bark: present
DOI: 10.1594/pangaea.146871
title: Tree-ring width of Pinus sylvestris from historical object sample 6056B/12A, Netherlands, Groningen

description: Species: Pinus sylvestris; No of rings: 163; first year: 1369; end year: 1532; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.146906
title: Tree-ring width of Quercus species from historical object sample 6044B/03A, Netherlands, Leiden

description: Species: Quercus species; No of rings: 91; first year: 1339; end year: 1430; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147319
title: Tree-ring width of Quercus species from historical object sample 5930B/02A, Netherlands, Leiden

description: Species: Quercus species; No of rings: 59; first year: 1387; end year: 1446; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.146679
title: Tree-ring width of Quercus species from historical object sample 6119B/01A, Netherlands, Zutphen-De Hoven

description: Species: Quercus species; No of rings: 40; first year: 1720; end year: 1760; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147096
title: Tree-ring width of Quercus species from historical object sample 5992B/08A, Netherlands, Donkerbroek

description: Species: Quercus species; No of rings: 105; first year: 1432; end year: 1537; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147099
title: Tree-ring width of Quercus species from historical object sample 5992B/05A, Netherlands, Donkerbroek

description: Species: Quercus species; No of rings: 61; first year: 1501; end year: 1562; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 11; Last ring under bark: absent
DOI: 10.1594/pangaea.147351
title: Tree-ring width of Quercus species from historical object sample 5922B/05A, Netherlands, Emmen

description: Species: Quercus species; No of rings: 67; first year: 1708; end year: 1775; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 21; Last ring under bark: present
DOI: 10.1594/pangaea.147452
title: Tree-ring width of Quercus species from historical object sample 5911B/09A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 62; first year: 1478; end year: 1540; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 15; Last ring under bark: present
DOI: 10.1594/pangaea.145741
title: Tree-ring width of Quercus species from historical object sample 6451B/01A, Netherlands, 's-Hertogenbosch

description: Species: Quercus species; No of rings: 96; first year: 1314; end year: 1410; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 9; Last ring under bark: absent
DOI: 10.1594/pangaea.147367
title: Tree-ring width of Quercus species from historical object sample 5920B/13A, Netherlands, Loon

description: Species: Quercus species; No of rings: 97; first year: 1404; end year: 1501; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 16; Last ring under bark: present
DOI: 10.1594/pangaea.147951
title: Tree-ring width of Quercus species from historical object sample 5619B/05A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 38; first year: 1245; end year: 1283; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147419
title: Tree-ring width of Quercus species from historical object sample 5914B/12A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 91; first year: 1345; end year: 1436; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147423
title: Tree-ring width of Quercus species from historical object sample 5914B/09A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 46; first year: 1403; end year: 1449; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 1; Last ring under bark: absent
DOI: 10.1594/pangaea.147401
title: Tree-ring width from historical object sample 5917B/07M, Netherlands, Deventer

description: Species: not given; No of rings: 71; first year: 1603; end year: 1674; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147958
title: Tree-ring width of Quercus species from historical object sample 5618B/06A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 22; first year: 1301; end year: 1323; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 3; Last ring under bark: absent
DOI: 10.1594/pangaea.145583
title: Tree-ring width of Quercus species from historical object sample 6493B/01A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 46; first year: 1379; end year: 1425; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.145722
title: Tree-ring width of Quercus species from historical object sample 6454B/03A, Netherlands, 's-Hertogenbosch

description: Species: Quercus species; No of rings: 30; first year: 1488; end year: 1518; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 10; Last ring under bark: absent
DOI: 10.1594/pangaea.145742
title: Tree-ring width of Quercus species from historical object sample 6449B/06M, Netherlands, Warffum

description: Species: Quercus species; No of rings: 126; first year: 1370; end year: 1496; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.145745
title: Tree-ring width of Quercus species from historical object sample 6449B/03B, Netherlands, Warffum

description: Species: Quercus species; No of rings: 114; first year: 1386; end year: 1500; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.145618
title: Tree-ring width of Picea abies from historical object sample 6486B/06A, Netherlands, Groningen

description: Species: Picea abies; No of rings: 50; first year: 1714; end year: 1764; Pith: not applicable; Heartwood: absent; Sapwood: unknown; Number of sapwood rings: 0; Last ring under bark: present
DOI: 10.1594/pangaea.145797
title: Tree-ring width of Quercus species from historical object sample 6432B/01A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 104; first year: 1488; end year: 1592; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 8; Last ring under bark: absent
DOI: 10.1594/pangaea.147536
title: Tree-ring width of Quercus species from historical object sample 5889B/05A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 35; first year: 1393; end year: 1428; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.145600
title: Tree-ring width of Pinus sylvestris from historical object sample 6489B/02A, Netherlands, Uitgeest

description: Species: Pinus sylvestris; No of rings: 111; first year: 1497; end year: 1608; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.145579
title: Tree-ring width of Quercus species from historical object sample 6493B/05A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 93; first year: 1421; end year: 1514; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 2; Last ring under bark: absent
DOI: 10.1594/pangaea.145751
title: Tree-ring width of Quercus species from historical object sample 6447B/05A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 54; first year: 1286; end year: 1340; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 3; Last ring under bark: absent
DOI: 10.1594/pangaea.148233
title: Tree-ring width of Quercus species from historical object sample 5443B/07A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 56; first year: 1474; end year: 1530; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 32; Last ring under bark: present
DOI: 10.1594/pangaea.145516
title: Tree-ring width of Pinus sylvestris from historical object sample 6509B/12A, Netherlands, Hoorn

description: Species: Pinus sylvestris; No of rings: 79; Age not determined; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.147475
title: Tree-ring width of Quercus species from historical object sample 5908B/16A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 133; first year: 1380; end year: 1513; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.148153
title: Tree-ring width of Quercus species from historical object sample 5510B/04A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 136; first year: 1303; end year: 1439; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.148680
title: Tree-ring width of Quercus species from historical object sample 2129B/09B, Netherlands, Anderen

description: Species: Quercus species; No of rings: 52; first year: 1330; end year: 1382; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 19; Last ring under bark: present
DOI: 10.1594/pangaea.148303
title: Tree-ring width of Quercus species from historical object sample 5420B/01A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 127; first year: 1549; end year: 1676; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 36; Last ring under bark: present
DOI: 10.1594/pangaea.148307
title: Tree-ring width of Quercus species from historical object sample 5419B/01A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 80; first year: 1249; end year: 1329; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 9; Last ring under bark: absent
DOI: 10.1594/pangaea.147703
title: Tree-ring width of Quercus species from historical object sample 5778B/03A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 47; first year: 1473; end year: 1520; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 2; Last ring under bark: absent
DOI: 10.1594/pangaea.148564
title: Tree-ring width of Quercus species from historical object sample 2158B/03A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 180; first year: 1354; end year: 1534; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.148198
title: Tree-ring width of Quercus species from historical object sample 5451B/01A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 77; first year: 1531; end year: 1608; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 12; Last ring under bark: present
DOI: 10.1594/pangaea.148683
title: Tree-ring width of Quercus species from historical object sample 2129B/07B, Netherlands, Anderen

description: Species: Quercus species; No of rings: 83; first year: 1511; end year: 1594; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 20; Last ring under bark: present
DOI: 10.1594/pangaea.148535
title: Tree-ring width of Quercus species from historical object sample 2163B/10A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 72; first year: 1389; end year: 1461; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 16; Last ring under bark: present
DOI: 10.1594/pangaea.148685
title: Tree-ring width of Quercus species from historical object sample 2129B/05A, Netherlands, Anderen

description: Species: Quercus species; No of rings: 68; first year: 1320; end year: 1388; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 17; Last ring under bark: absent
DOI: 10.1594/pangaea.148540
title: Tree-ring width of Quercus species from historical object sample 2162B/05A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 74; first year: 1305; end year: 1379; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 14; Last ring under bark: present
DOI: 10.1594/pangaea.148543
title: Tree-ring width of Quercus species from historical object sample 2162B/02A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 89; first year: 1290; end year: 1379; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 18; Last ring under bark: present
DOI: 10.1594/pangaea.148424
title: Tree-ring width of Quercus species from historical object sample 5166B/16A, Netherlands, Dronryp/Friesland

description: Species: Quercus species; No of rings: 43; first year: 1464; end year: 1507; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 1; Last ring under bark: absent
DOI: 10.1594/pangaea.148459
title: Tree-ring width of Quercus species from historical object sample 5145B/10A, Netherlands, Dronryp/Friesland

description: Species: Quercus species; No of rings: 57; first year: 1425; end year: 1482; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 1; Last ring under bark: absent
DOI: 10.1594/pangaea.873326
title: Element content on spot measurements with SEM/EDX at station GeoB15914-1
DOI: 10.1594/pangaea.145531
title: Tree-ring width of Quercus species from historical object sample 6508B/07A, Netherlands, Alkmaar

description: Species: Quercus species; No of rings: 69; first year: 1491; end year: 1560; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 1; Last ring under bark: absent
DOI: 10.1594/pangaea.146802
title: Tree-ring width of Quercus species from historical object sample 6069B/03A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 77; first year: 1441; end year: 1518; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 9; Last ring under bark: absent
DOI: 10.1594/pangaea.146767
title: Tree-ring width of Quercus species from historical object sample 6089B/01A, Netherlands, Amersfoort

description: Species: Quercus species; No of rings: 126; first year: 1417; end year: 1543; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 20; Last ring under bark: absent
DOI: 10.1594/pangaea.146663
title: Tree-ring width of Pinus sylvestris from historical object sample 6122B/10M, Netherlands, Groningen

description: Species: Pinus sylvestris; No of rings: 244; first year: 1379; end year: 1623; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.146672
title: Tree-ring width of Pinus sylvestris from historical object sample 6122B/03A, Netherlands, Groningen

description: Species: Pinus sylvestris; No of rings: 221; first year: 1402; end year: 1623; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 76; Last ring under bark: absent
DOI: 10.1594/pangaea.145692
title: Tree-ring width of Quercus species from historical object sample 6464B/05A, Netherlands, 's-Hertogenbosch

description: Species: Quercus species; No of rings: 27; first year: 1422; end year: 1449; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.145857
title: Tree-ring width of Quercus species from historical object sample 6405B/02A, Netherlands, 's-Hertogenbosch

description: Species: Quercus species; No of rings: 68; first year: 1394; end year: 1462; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 1; Last ring under bark: absent
DOI: 10.1594/pangaea.146431
title: Tree-ring width of Quercus species from historical object sample 6185B/01A, Netherlands, Schiphorst

description: Species: Quercus species; No of rings: 98; first year: 1445; end year: 1543; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 19; Last ring under bark: present
DOI: 10.1594/pangaea.146443
title: Tree-ring width of Quercus species from historical object sample 6180B/13B, Netherlands, Doesburg

description: Species: Quercus species; No of rings: 22; Age not determined; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.146188
title: Tree-ring width of Quercus species from historical object sample 6290B/02A, Netherlands, Groningen

description: Species: Quercus species; No of rings: 49; first year: 1526; end year: 1575; Pith: not applicable; Heartwood: absent; Sapwood: absent; Number of sapwood rings: 0; Last ring under bark: absent
DOI: 10.1594/pangaea.146981
title: Tree-ring width of Pinus sylvestris from historical object sample 6032B/09A, Netherlands, Vierhuizen

description: Species: Pinus sylvestris; No of rings: 76; first year: 1498; end year: 1574; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 8; Last ring under bark: absent
DOI: 10.1594/pangaea.146812
title: Tree-ring width of Quercus species from historical object sample 6068B/05A, Netherlands, Zutphen

description: Species: Quercus species; No of rings: 77; first year: 1560; end year: 1637; Pith: not applicable; Heartwood: complete; Sapwood: complete; Number of sapwood rings: 16; Last ring under bark: present
DOI: 10.1594/pangaea.52388
title: Sedimentological analysis of core PS2556-2
DOI: 10.1594/pangaea.145864
title: Tree-ring width of Pinus sylvestris from historical object sample 6404B/05A, Netherlands, Midwolda

description: Species: Pinus sylvestris; No of rings: 178; first year: 1550; end year: 1728; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 60; Last ring under bark: absent
DOI: 10.1594/pangaea.145865
title: Tree-ring width of Pinus sylvestris from historical object sample 6404B/03A, Netherlands, Midwolda

description: Species: Pinus sylvestris; No of rings: 206; first year: 1543; end year: 1749; Pith: not applicable; Heartwood: complete; Sapwood: incomplete; Number of sapwood rings: 84; Last ring under bark: absent
DOI: 10.1594/pangaea.695144
title: Mesozooplankton abundance in water of the Aegean Sea at Station MAY-1997-MNB5wp2
DOI: 10.1594/pangaea.249974
title: Plankton abundance of mocness net M44/4_D-MOC216
DOI: 10.1594/pangaea.143607
title: Heavy mineral contents in 50-100 µm grain size fraction of bottom sediments from the Core AKK2000-105, Barents Sea
DOI: 10.1594/pangaea.830179
title: Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13/3
DOI: 10.1594/pangaea.703258
title: Abundance of mesozooplankton in the Ionian Sea in April-May 1992. Part 2

description: Mouth diameter of the net was 113 cm, mesh size 200 µm. Samples were immediately fixed with formaldehyde (2-4% final concentration) for specimen identification and counts. Volumes of filtered seawater were estimated by multiplying the area of the net mouth by heights of sampled layers from winch readings. Identification and counts of specimens were performed on aliquots 1/4 of fixed samples by using a graduate large-bore pipette. Copepods were identified to the species level and separated into females, males and juveniles (copepodites). All other taxa were identified at the species level when possible, or at higher taxonomic levels. Taxonomic identification was done according to the most relevant and updated taxonomic literature.
DOI: 10.15468/dl.3kdd5a
title: Occurrence Download

description: A dataset containing 5359 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Spizaetus isidori"
 ]
}

 The dataset includes 5359 records from 54 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001712-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.830180
title: Meiofauna and nematodes in cold seep surface sediments collected during Maria S. Merian cruise MSM13/4
DOI: 10.1594/pangaea.125587
title: Mineral composition of 0.1-0.05 mm size fraction of sediment core PS-1269
DOI: 10.1594/pangaea.125588
title: Mineral composition of 0.1-0.05 mm size fraction of sediment core PS-1270