cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.755298
title: (Appendix) Chemical elements of analyzed glass shards of ODP Hole 113-697B

description: Data set is normalized to 100% water free. Original sums range approximately between 93% and 98%, depending on the volatile content and measured bubblefree surface.
DOI: 10.1594/pangaea.497932
title: Physical oceanography from BT during cruise U58X001607B_1963
DOI: 10.1594/pangaea.831059
title: (Table 3) Benthic foraminiferal Mg/Ca and Li/Ca ratios measured in cruise KNR166-2 surface sediment and LGM samples
DOI: 10.1594/pangaea.898726
title: Ultra-violet measurements from station Boulder, SURFRAD (2018-04)
DOI: 10.1594/pangaea.898824
title: Other measurements at 10 m from station Boulder, SURFRAD (2017-10)
DOI: 10.1594/pangaea.499127
title: Physical oceanography from BT during cruise U90X008320B_1984
DOI: 10.1594/pangaea.830967
title: Satellite-based daily mean lake surface water temperatures from Lake_Murten, 1989-2013

description: The daily mean Lake Surface Water Temperature (LSWT) has been extracted from all available satellite observations of a particular day by using the data from a 3x3 pixel array at the center of the lake. See "Events(s)" for Lake/pixel co-ordinates.
DOI: 10.1594/pangaea.728249
title: (Table 2) Diatom abundance and nannofossil and diatom zonation of ODP Hole 115-714A
DOI: 10.1594/pangaea.897549
title: Foraminifera analysis during the retreat of the Smith Sound ice stream in the early Holocene from sediment core 2001LSSL-014PC
DOI: 10.1594/pangaea.904584
title: Table SM-16: Sites 138-849 and 321-U1338 combined isotope data
DOI: 10.1594/pangaea.720747
title: Documentation of sediment core GIK23041-2
DOI: 10.1594/pangaea.856973
title: A coupled model for carbon and radiocarbon evolution during the last deglaciation, link to model results

description: Changes in the ventilation of the Southern Ocean are thought to play an important role on deglacial carbon and radiocarbon evolution, but have not been tested within a coupled climate-carbon model. Here, we present such a simulation based on a simple scenario of transient deglacial sinking of brines — sea-ice salt rejections — around Antarctica, which modulates Southern Ocean ventilation. This experiment is able to reproduce deglacial atmospheric changes in carbon and radiocarbon but also ocean radiocarbon records measured in the Atlantic, Southern and Pacific Oceans. Simulated for the first time in a fully coupled climate-carbon model including radiocarbon, our modeling results suggest that the deglacial changes in atmospheric carbon dioxide and radiocarbon were achieved by means of a breakdown in the glacial brine-induced stratification of the Southern Ocean.
description: Supplement to: Mariotti, Véronique; Paillard, Didier; Bopp, Laurent; Roche, Didier M; Bouttes, Nathaëlle (2016): A coupled model for carbon and radiocarbon evolution during the last deglaciation. Geophysical Research Letters, 43(3), 1306-1313
DOI: 10.1594/pangaea.857347
title: (Fig. 3d) Paleosalinity reconstruction for sediment core NEAP-18K
DOI: 10.1594/pangaea.511717
title: Physical oceanography and CFC measured on water bottle samples at station M59/2_524
DOI: 10.1594/pangaea.904445
title: Table SM-17: The EEP compiled age model (short format)

description: The composite age model can be found in the left-most 7 columns. This includes the sample ID, CSF & CCSF of the original tiepoint at either 849 or U1338, as well as the U1338-equivalent CCSF, Age, tie type and source.The other 21 columns contain the equivalent sample ID and depth information for each age tie point at each individual site. These can be used to calculate age directly at each of the 7 sites.
DOI: 10.1594/pangaea.749586
title: Meteorological observations during HIND cruise from New York to Halifax started at 1766-05-29
DOI: 10.1594/pangaea.898759
title: Temperature profiles during the field campaign of the Bolzano Tracer EXperiment (BTEX)

description: Temperature profiles were measured by means of a MTP-5HE passive microwave radiometer, manifactured by Attex (Russia). The MTP-5HE is installed in the airfield of Bolzano (46.459843 N, 11.323169 E, 238 m ASL) on the roof of a building 12 m high. The device was operated so as to provide every 10 min the vertical profile of the temperature with a maximum range of 1000 m and with a vertical resolution of 50 m. Temperature profiles are provided by the Physical Chemistry Laboratory of the Environmental Protection Agency of the Autonomous Province of Bolzano (http://www.provincia.bz.it/it/contatti.asp?orga_orgaid=882).
DOI: 10.1594/pangaea.898986
title: Radiosonde measurements from station Payerne (2018-06)
DOI: 10.1594/pangaea.899080
title: Ultra-violet measurements from station Desert Rock (2019-01)
DOI: 10.1594/pangaea.824464
title: Thermal conductivity of IODP Hole 318-U1358B

description: Geocode = Depth CSF-A (m)
DOI: 10.1594/pangaea.898760
title: Meteorological observations of ground weather stations during the field campaign of the Bolzano Tracer EXperiment (BTEX)

description: Meteorological observations from the ground weather stations are provided as 10-min averages. The time-stamp refers to the end of the averaging period. Data collected by the ground weather stations can be also freely downloaded from the open data web-service of the Autonomous Province of Bolzano (http://dati.retecivica.bz.it/it/group/weather).
DOI: 10.1594/pangaea.899110
title: Carbonate and TOC content and isotopic composition from DSDP Site 22-211 along the Sunda margin

description: #999 = not determinded (n.d.)#000 = below detection limit (b.d.l.)
DOI: 10.1594/pangaea.880522
title: Optical (absorption and attenuation spectra) and biogeochemical (chlorophyll and total suspended matter concentrations) data collected in the Ligurian sea during RV Alliance BP09 cruise (13-26th March 2009)
DOI: 10.1594/pangaea.898849
title: Radiosonde measurements from station Boulder, SURFRAD (2018-07)

description: Start location: Denver, CO; Distance from radiation site: 40 km; If launch time is exactly 00Z or 12Z, the actual launch time is likely unknown
DOI: 10.1594/pangaea.898901
title: Meteorological synoptical observations from Neumayer Station (2008-04)

description: Version 2, 2019-03-01 with some minor corrections to the codes.
DOI: 10.1594/pangaea.898907
title: Meteorological synoptical observations from Neumayer Station (2008-09)

description: Version 2, 2019-03-01 with some minor corrections to the codes.
DOI: 10.1594/pangaea.910955
title: Continuous thermosalinograph oceanography along Heincke cruise track HE535
DOI: 10.1594/pangaea.899007
title: Other measurements at 30 m from station Payerne (2018-09)
DOI: 10.1594/pangaea.822452
title: Meteorological measurements in the upper air at station Ostrov Dikson, 1934-10-31 to 1935-07-08, ERA-CLIM ID 4710
DOI: 10.1594/pangaea.898930
title: Effect of atorvastatin on the xenobioitic detoxification of blue mussels, Mytilus edulis

description: Increasing concentration of biologically active pharmaceutical compounds can affect marine organisms. The bioavailability and environmental stability of these compounds make them potential threat to these organisms, specially the sessile organisms. We have examined the effects of atorvastatin, a globally prescribed drug, on the blue mussels – Mytilus edulis. In this data set, we presents the effect of atorvastatin (ATO) on detoxification of Mytilus edulis.
DOI: 10.1594/pangaea.548177
title: Nutrients and bacteria measured on water bottle samples at station Chip_2004-01-09_09, Chipana, Chile
DOI: 10.1594/pangaea.890561
title: Relative abundances of Cladocera species in surface sediment (fossil integrative communities) from lakes in northern Finnish Lapland
DOI: 10.1594/pangaea.898992
title: Radiosonde measurements from station Payerne (2018-07)
DOI: 10.1594/pangaea.899115
title: Carbonate and TOC content and isotopic composition from DSDP Site 27-260 along the Sunda margin

description: #999 = not determinded (n.d.)#000 = below detection limit (b.d.l.)
DOI: 10.1594/pangaea.808767
title: (Table 1) Calcium carbonate at DSDP Leg 78A Holes
DOI: 10.1594/pangaea.663836
title: Oceanography at CTD/bottle station IFREMER_0676
DOI: 10.1594/pangaea.495945
title: Water temperature MBT profiles from cruise U90M_1989
DOI: 10.1594/pangaea.857409
title: Predator nonconsumptive effects on prey recruitment weaken with recruit density, supplementary material

description: We investigated the nonconsumptive effects (NCEs) of predatory dogwhelks (Nucella lapillus) on intertidal barnacle (Semibalanus balanoides) recruitment through field experiments on the Gulf of St. Lawrence coast and the Atlantic coast of Nova Scotia, Canada. We studied the recruitment seasons (May-June) of 2011 and 2013. In 2011, the Gulf coast had five times more nearshore phytoplankton (food for barnacle larvae and recruits) during the recruitment season and yielded a 58% higher barnacle recruit density than the Atlantic coast at the end of the recruitment season. In 2013, phytoplankton levels and barnacle recruit density were similar on both coasts and also lower than for the Gulf coast in 2011. Using the comparative-experimental method, the manipulation of dogwhelk presence (without allowing physical contact with prey) revealed that dogwhelk cues limited barnacle recruitment under moderate recruit densities (Atlantic 2011/2013 and Gulf 2013) but had no effect under a high recruit density (Gulf 2011). Barnacle recruits attract settling larvae through chemical cues. Thus, the highest recruit density appears to have neutralized dogwhelk effects. This study suggests that the predation risk perceived by settling larvae may decrease with increasing recruit density and that prey food supply may indirectly influence predator NCEs on prey recruitment.
description: Supplement to: Ellrich, Julius A; Scrosati, Ricardo A; Molis, Markus (2015): Predator nonconsumptive effects on prey recruitment weaken with recruit density. Ecology, 96(3), 611-616
DOI: 10.1594/pangaea.763555
title: (Table 1a) Concentrations of suspended matter and heavy metals in melted snow water from the Barents Sea and the vessel deck
DOI: 10.1594/pangaea.737389
title: (Table 5) Oxygen isotope data for clay minerals extracted from vesicles of the upper volcanic series of ODP Hole 104-642E

description: Temperature calculated by assuming formation in equilibrium with water at 0 per mil and using the fractionation factor of glauconite (Savin and Epstein, 1970, doi:10.1016/0016-7037(70)90149-3) for celadonite, and of Mg-smectites (Escande, 1983) for saponite. The chemical analyses of samples are given in Tables 1 (doi:10.1594/PANGAEA.737383) and 2 (doi:10.1594/PANGAEA.737384).
DOI: 10.1594/pangaea.830564
title: Point cloud of a flowstone wall measured with a terrestrial laser scanner
DOI: 10.1594/pangaea.499525
title: Physical oceanography from BT during cruise U90XX08323B_1985
DOI: 10.1594/pangaea.706207
title: (Table 3) Composition of oxidative phases (stages 1-2) of altered rocks with increasing distance across the eastern flank of the Juan de Fuca Ridge, ODP Leg 168 data
DOI: 10.1594/pangaea.785844
title: (Figure 4) Dinoflagellate cyst measured on sediment core AI07-03G
DOI: 10.1594/pangaea.895601
title: Distribution of soil branched glycerol dialkyl glycerol tetraether lipids (brGDGT) along an altitudinal transect in the Jimma zone of the southwest Ethiopian highlands
DOI: 10.1594/pangaea.749528
title: Meteorological observations during HAMPSHIRE cruise from Spithead to Cork started at 1757-11-06
DOI: 10.1594/pangaea.757190
title: (Table 8) Carbohydrates in sediments of ODP Site 117-724

description: Ages are calculated on biostratigraphical and magnetostratigraphical data from the shipboard party (1989, doi:10.2973/odp.proc.ir.117.111.1989).
DOI: 10.1594/pangaea.495205
title: Water temperature XBT profiles from cruise U18HN56164_1976
DOI: 10.1594/pangaea.694351
title: Nutrient concentrations in water samples from the Aegean Sea at Station SEPT-1998-S08
DOI: 10.1594/pangaea.830409
title: Historical genetic data set as flat file (zipped)

description: The file YTH_historical_genetics.txt is a tab-delimited text file that includes geographic data and partial mitochondrial ND2 sequences for 7 museum samples of Lichenostomus melanops (the Yellow-tufted Honeyeater). Genetic data was collected by Katherine Harrisson (mitochondrial ND2 sequences). Contact Katherine Harrisson (mailto:katherine.harrisson@gmail.com).
DOI: 10.1594/pangaea.873665
title: (Table 1) Major and minor elements in hydrothermal fluids from three shallow-sea vents offshore Panarea
DOI: 10.1594/pangaea.848905
title: Geochemistry of composite core PG2023
DOI: 10.1594/pangaea.552207
title: Morphometric parameters of the kelp Lessonia trabeculata from Chipana Bay (Northern Chile)
DOI: 10.1594/pangaea.828693
title: Interstitial water analysis from IODP Hole 336-U1382A

description: Geocode = Top depth CSF-A (m)
DOI: 10.1594/pangaea.788773
title: pH measurements during METEOR cruise M76/3b at the REGAB seep site in 2008

description: Project: DFG-Research Center/Excellence Cluster The Ocean in the Earth System (MARUM) and the Max Planck Institute for Marine Microbiology, Bremen, Germany.
DOI: 10.1594/pangaea.753725
title: Radiosonde measurements from station Tamanrasset (2010-09)

description: Start location: Tamanrasset; Distance from radiation site: 10 km
DOI: 10.1594/pangaea.872072
title: (Table S7) Mediterranean cyclostratigraphic tuned time scale IODP Site 339-U1385
DOI: 10.1594/pangaea.497068
title: Physical oceanography from BT during cruise M90DI00019B_1955
DOI: 10.1594/pangaea.618914
title: Hydrochemistry measured on water bottle samples during Garcia del Cid cruise GIFT-3
DOI: 10.1594/pangaea.742886
title: (Table 2) Alkalinity, ph and chemistry of surface seawater
DOI: 10.1594/pangaea.830043
title: Basic measurements of radiation at station Palaiseau (2004-01)

description: Version 3, 2014-02-27
DOI: 10.1594/pangaea.923807
title: In-situ light measurements of oxygen, pH and sulfide in a microbial mat from the Atacama Desert, Chile
DOI: 10.1594/pangaea.923809
title: In-situ dark measurements of oxygen, pH and sulfide in a microbial mat from the Atacama Desert, Chile
DOI: 10.1594/pangaea.497243
title: Physical oceanography from BT during cruise M90TC00035B_1990
DOI: 10.1594/pangaea.774649
title: Fossil occurrence of calcareous nannofossils from IODP Hole 316-C0007C

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.897956
title: ARM intensity/magnetic susceptibility ratio of the Miocene section of ANDRILL AND-2A drill core
DOI: 10.1594/pangaea.587138
title: Physical oceanography at CTD station M1_CTD255 of the Persian Gulf
DOI: 10.1594/pangaea.690641
title: (Fig. 7) Stratigraphic distribution of Paleogene calcareous nannofossils in the Contessa Highway section, Italy

description: Point distance is the sample level (m). Species abundance: A = abundant (&gt;10 %), C = common (1-10 %), F = few (0.1-1 %), R = rare (&lt;0.1 %), - = not present
DOI: 10.1594/pangaea.494564
title: Physical oceanography during cruise CUSNS_1936
DOI: 10.1594/pangaea.897959
title: Mr/Ms and Bcr/Bc measurements in the Miocene section of ANDRILL AND-2A drill core
DOI: 10.1594/pangaea.495524
title: Water temperature XBT profiles from cruise U46XX48399_1969
DOI: 10.1594/pangaea.748695
title: Meteorological observations during Drie Vrienden cruise from Nieuwediep to Batavia started at 1848-09-27
DOI: 10.1594/pangaea.899814
title: Foraminifera production index of sediment cores of the southwest Pacific
DOI: 10.1594/pangaea.664687
title: Oceanography at CTD/bottle station IFREMER_1527
DOI: 10.1594/pangaea.750524
title: Meteorological observations during LUCIPARAS cruise from Antwerpen to Batavia started at 1847-08-10
DOI: 10.1594/pangaea.748836
title: Meteorological observations during El Colon cruise from La Coruña to La Habana started at 1767-05-01
DOI: 10.1594/pangaea.750304
title: Meteorological observations during LAMPHITRITE cruise from Brest to Fort Royal started at 1775-06-05
DOI: 10.1594/pangaea.749855
title: Meteorological observations during Jacoba Maurina cruise from Batavia to Texel started at 1841-11-10
DOI: 10.1594/pangaea.829956
title: Moisture and density (MAD) measured on IODP Hole 338-C0002L

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.829735
title: Air humidity and temperature at ground level, Tichki, 2004-11-17 to 2005-04-11

description: Tinytag measurements of temperature and humidity were conducted from Nov. 2004 up to April 2005 2m above ground nearby agricultural fields in Mountain oasis Tichki Drâa catchment. Dataset created by IMPETUS subproject B3. IMPETUS data set ID: 582
DOI: 10.1594/pangaea.829693
title: Structure description (VCD) from IODP Hole 338-C0002J

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.859502
title: Physical oceanography of CTD station CTD_20120822_st1
DOI: 10.1594/pangaea.787695
title: Physical oceanography during Maria S. Merian cruise MSM05/2

description: nc_data_set_type = ctdnc_ext = ctdnc_title = IFM-GEOMAR PO-processed CTD data of cruise Merian 5/2 CTD station number 1nc_ship_name = FS Maria S. Meriannc_pi_name = Juergen Fischernc_cruise_leg = 2nc_chief_scientist = Juergen Fischernc_author = Gerd Krahmannnc_contact = gkrahmann@geomar.denc_data_type = station datanc_source = CTD profile observationnc_institution = IFM-GEOMAR, Leibniz Institute of Marine Sciences (at Kiel University)nc_institution_references = http://www.geomar.denc_comment = nc_references = BSH Ref-No.: 20070071nc_history = created during CTD processingnc_cdm_data_type = Stationnc_quality_control_indicator = 5nc_quality_index = Anc_project = NORDATLANTIKnc_uncertainty_p = 2.000000nc_uncertainty_t = 0.002000nc_uncertainty_s = 0.002000Oxygen values are removed because of doubtful calibration.
DOI: 10.1594/pangaea.829117
title: Carbonate analysis from IODP Hole 340-U1397B

description: Geocode = Top depth CSF-A (m)
DOI: 10.1594/pangaea.829892
title: Headspace-gas measurements from IODP Hole 338-C0002L

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.739262
title: Pollen profile GLEBOCZ, Gleboczek Lake, Poland

description: The EPD (http://www.europeanpollendatabase.net) accepted species name is given in the parameter comment. This dataset was archived on 2010-05-11 from the EPD database.
DOI: 10.1594/pangaea.829285
title: P-Wave velocity (PWL) from IODP Hole 340-U1400B

description: Geocode = Depth CSF-A (m)
DOI: 10.1594/pangaea.739250
title: Pollen profile GELMT, Gelmyazevskoye, Ukraine

description: L. Post method.The EPD (http://www.europeanpollendatabase.net) accepted species name is given in the parameter comment. This dataset was archived on 2010-05-11 from the EPD database.
DOI: 10.1594/pangaea.497779
title: Physical oceanography from BT during cruise U58VD01475B_1949
DOI: 10.1594/pangaea.787920
title: (Table 2) Eocene to Oligocene nannofossil range chart for ODP Hole 134-828B

description: Species abundance: H = highly abundant: 101-1000 specimens per field of view; V = very abundant: 11-100 specimens per field of view; A = abundant: 1-10 specimens per field of view; C = common: 1 specimen per 2 to 10 fields of view; F = few: 1 specimen per 11 to 100 fields of view; R = rare: 1 specimen per 101 to 1000 fields of view; S = sparse (? not defined by author), - = absent. Small case letters = reworked.
DOI: 10.1594/pangaea.711290
title: (Table 4) Isotope ratios for Globorotalia menardii and host sediments of ODP Hole 121-758A

description: The chronostratigraphy used here is based on the correlation of the site 758 oxygen isotope record from the planktonic foraminifer Globigerinoides sacculifer (Farell and Janacek, 1991, doi:10.2973/odp.proc.sr.121.124.1991), to the global average oxygen isotope record, the SPECMAP stack (Imbrie et al., 1984). This chronostratigraphy is consistent with biostratigraphic data (Shipboard Scientific party, Site 758,1989, doi:10.2973/odp.proc.ir.121.112.1989) and the disappearance of the pink variety of Globigerinoides ruber at 120 kyr (Shackleton and Opdyke, 1973, doi:10.1016/0033-5894(73)90052-5)
DOI: 10.1594/pangaea.739339
title: Pollen profile JARVEOTS, Lake Jarveotsa, Estonia

description: The EPD (http://www.europeanpollendatabase.net) accepted species name is given in the parameter comment. This dataset was archived on 2010-05-11 from the EPD database.
DOI: 10.1594/pangaea.663600
title: Oceanography at CTD/bottle station IFREMER_0440
DOI: 10.1594/pangaea.858640
title: (Appendix 5-1) Field measurements of limnological samples
DOI: 10.1594/pangaea.739264
title: Pollen profile GLUBELKA, Lake Glubelka, Belarus

description: The EPD (http://www.europeanpollendatabase.net) accepted species name is given in the parameter comment. This dataset was archived on 2010-05-11 from the EPD database.
DOI: 10.1594/pangaea.690692
title: Mesozooplankton biomass during Professor Vodyanitskiy cruise PV5, Part IV

description: Mesozooplankton was sampled by open-closing JUDAY net with a 36 cm ring diameter and mesh size of 125 µm. Additionally, the JUDAY oceanic model JOM with 300 µm mesh size and 80 cm ring diameter was used. The open-closing mechanism used was the Nansen mechanical lock system allowing nets to be vertically towed through standard depths (0-10, 10-25, 25-50, 50-100, 100-200, 200-300, 300-500 m) and closed at the upper depth level. Depth of tow was evaluated by wire paid out and the angle of wire inclination. The 10-20 ml samples were preserved in 3-4% buffered formaldehyde and processed on return to the laboratory. All of copepods were identified to genus level, other taxanomic groups - to type, class, order and family levels.
DOI: 10.1594/pangaea.772694
title: Ex situ microsensor measurement in Nordic Margin seep sediments VKGD275/PC-1
DOI: 10.1594/pangaea.785520
title: (Figure 3) Distribution of Maastrichtian calcareous nannofossils in ODP Hole 132-810C

description: Sediment depth is given in mbsf. Species abundance: A = abundant (more than 1 specimen per field of view; 1250 X); C = common (at least 1 specimen in 10 fields of view); F = frequent (at least 1 specimen in 30 fields of view); R = rare (less than 1 specimen in 30 fields of view); RR = very rare (1 or 2 specimens detected during the analysis).
DOI: 10.1594/pangaea.870666
title: Batch experiment on sample V30HKB

description: Site: Hankenbüttel 83; Grain size description: unsorted
DOI: 10.1594/pangaea.745900
title: (Table 1) Parameters of hydrothermal solutions from the axis of the East Pacific Rise near 9°50'N
DOI: 10.1594/pangaea.829005
title: Reflectance spectroscopy and colorimetry from IODP Hole 339-U1386A

description: Geocode = Depth CSF-A (m)
DOI: 10.1594/pangaea.497364
title: Physical oceanography from BT during cruise U06KO00246B_1944
DOI: 10.1594/pangaea.829506
title: Wind direction and speed from the Vernagtferner Basin - Vernagtbach station, for the year 2006
DOI: 10.1594/pangaea.665851
title: Oceanography at CTD/bottle station IFREMER_2677
DOI: 10.1594/pangaea.665871
title: Oceanography at CTD/bottle station IFREMER_2697
DOI: 10.1594/pangaea.712437
title: (Table 2) Silicon isotope data for sponge spicules from ODP Hole 113-689B

description: The silicon isotope composition (d30Si) of biogenic opal provides a view of the silica cycle at times in the past. Reconstructions require the knowledge of silicon isotope fractionation during opal biomineralization. The d30Si of specimens of hexactinellid sponges and demosponges growing in the modern ocean ranged from -1.2 per mil to -3.7 per mil (n = 6), corresponding to the production of opal that has a d30Si value 3.8 per mil +/- 0.8 per mil more negative than seawater silicic acid and a fractionation factor (a) of 0.9964. This is three times the fractionation observed during opal formation by marine diatoms and terrestrial plants and is the largest fractionation of silicon isotopes observed for any natural process on Earth. The d30Si values of sponge spicules across the Eocene-Oligocene boundary at Ocean Drilling Program Site 689 on Maud Rise range from -1.1 per mil to -3.0 per mil, overlapping the range observed for sponges growing in modern seawater.