cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5281/zenodo.14947545
title: Dataset for Sediment Mixing in a Proglacial Catchment at Prestahnukur Volcano, Iceland:  Implications for Silicic Deposits at Gale Crater, Mars

description: Abstract

The discovery of silica polymorphs in the Buckskin mudstone at Gale Crater has important implications for understanding high-temperature processes on Mars. Three deposition/formation mechanisms have been proposed: direct deposition of silicic volcanic ash, in-situ hydrothermal alteration of sedimentary bedrock, or fluvial transport and concentration of eroded silicic material from within the Gale Crater catchment in an ancient lake. To evaluate the transport hypotheses, we conducted a source-to-sink study at Prestahnúkur Volcano, Iceland, where silicic materials exist within a predominantly basaltic terrain. Through systematic sampling at 0.2 km intervals along two distinct sediment transport pathways, we characterized the spatial evolution of physical and compositional sediment properties using particle size analysis, X-ray diffraction, and X-ray fluorescence. Our results reveal three key findings: (1) physical sorting of sediments occurs upstream from effective mineralogical and chemical mixing, (2) mixing between silicic and mafic components is extremely efficient once initiated, achieving near-complete homogenization over distances less than 0.4 km, and (3) palagonitic materials significantly influence sediment chemistry during transport, producing characteristic enrichments in FeO, Ni, and Cr. The observed rapid homogenization of sediment compositions  reduces the likelihood of catchment-derived transport as a viable mechanism for concentrating silicic materials in the Buckskin mudstone, as any silicic material from Gale Crater's walls or central peak would have been thoroughly mixed with basaltic components before reaching the depositional site. These findings narrow the possible formation mechanisms to either direct volcanic ash deposition or in-situ hydrothermal alteration, providing important constraints for understanding the geological history of Gale Crater.
DOI: 10.5281/zenodo.14947546
title: Dataset for Sediment Mixing in a Proglacial Catchment at Prestahnukur Volcano, Iceland:  Implications for Silicic Deposits at Gale Crater, Mars

description: Abstract

The discovery of silica polymorphs in the Buckskin mudstone at Gale Crater has important implications for understanding high-temperature processes on Mars. Three deposition/formation mechanisms have been proposed: direct deposition of silicic volcanic ash, in-situ hydrothermal alteration of sedimentary bedrock, or fluvial transport and concentration of eroded silicic material from within the Gale Crater catchment in an ancient lake. To evaluate the transport hypotheses, we conducted a source-to-sink study at Prestahnúkur Volcano, Iceland, where silicic materials exist within a predominantly basaltic terrain. Through systematic sampling at 0.2 km intervals along two distinct sediment transport pathways, we characterized the spatial evolution of physical and compositional sediment properties using particle size analysis, X-ray diffraction, and X-ray fluorescence. Our results reveal three key findings: (1) physical sorting of sediments occurs upstream from effective mineralogical and chemical mixing, (2) mixing between silicic and mafic components is extremely efficient once initiated, achieving near-complete homogenization over distances less than 0.4 km, and (3) palagonitic materials significantly influence sediment chemistry during transport, producing characteristic enrichments in FeO, Ni, and Cr. The observed rapid homogenization of sediment compositions  reduces the likelihood of catchment-derived transport as a viable mechanism for concentrating silicic materials in the Buckskin mudstone, as any silicic material from Gale Crater's walls or central peak would have been thoroughly mixed with basaltic components before reaching the depositional site. These findings narrow the possible formation mechanisms to either direct volcanic ash deposition or in-situ hydrothermal alteration, providing important constraints for understanding the geological history of Gale Crater.
DOI: 10.15468/dl.a8a65f
title: Occurrence Download

description: A dataset containing 7663 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "Geometry POLYGON((-98.68531 24.49433,-75.11194 24.49433,-75.11194 37.37264,-98.68531 37.37264,-98.68531 24.49433))",
 "HasGeospatialIssue is false",
 "IucnRedListCategory is CR",
 "OccurrenceStatus is Present",
 "Year 2001-2025"
 ]
}

 The dataset includes 7663 records from 97 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000997-250227182430271/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.9vrffr
title: Occurrence Download

description: A dataset containing 2262 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Harpalus honestus (Duftschmid, 1812)"
 ]
}

 The dataset includes 2262 records from 118 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000999-250227182430271/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hh4gbd
title: Occurrence Download

description: A dataset containing 23000 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Ecuador",
 "TaxonKey is Orochelidon murina (Cassin, 1853)"
 ]
}

 The dataset includes 23000 records from 8 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000998-250227182430271/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.2r2d54
title: Occurrence Download

description: A dataset containing 12 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Spermacoce resinosula Harwood"
 ]
}

 The dataset includes 12 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001001-250227182430271/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wv5aab
title: Occurrence Download

description: A dataset listing the 204985 species recorded in GBIF matching the query:
{
 "and" : [
 "Country is Mexico",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset's 204985 records were derived from 2852 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001006-250227182400228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.k0d5q4
title: Occurrence Download

description: A dataset containing 14 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Apinagia glaziovii (Warm.) P.Royen"
 ]
}

 The dataset includes 14 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0010936-190621201848488/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.66hefc
title: Occurrence Download

description: A dataset containing 6380745 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Canada",
 "TaxonKey is Insecta",
 "Year 1901-2021"
 ]
}

 The dataset includes 6380745 records from 484 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000563-210819072339941/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.krp3t6
title: Occurrence Download

description: A dataset containing 1747 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 }
 ]
 },
 "TaxonKey is Synallaxis propinqua Pelzeln, 1859"
 ]
}

 The dataset includes 1747 records from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0052581-240229165702484/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mts4oq
title: Occurrence Download

description: A dataset containing 113743 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Trichosurus vulpecula (Kerr, 1792)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 113743 records from 52 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0010926-190621201848488/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.v4vuy7
title: Occurrence Download

description: A dataset containing 6721 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Populus deltoides W.Bartram ex Marshall"
 ]
}

 The dataset includes 6721 records from 206 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000068-190307172214381/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.774exn
title: Occurrence Download

description: A dataset containing 396 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Poladryas arachne (W.H.Edwards, 1869)"
 ]
}

 The dataset includes 396 records from 22 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0069277-231120084113126/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.sdwi2r
title: Occurrence Download

description: A dataset containing 150896 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bufo bufo (Linnaeus, 1758)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 150896 records from 552 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0010930-190621201848488/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5tagzm
title: Occurrence Download

description: A dataset containing 48958 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Corydalis solida (L.) Clairv."
 ]
}

 The dataset includes 48958 records from 305 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0111146-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dfjv35
title: Occurrence Download

description: A dataset containing 79 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Fraxinus oxycarpa",
 "HasCoordinate is true"
 ]
}

 The dataset includes 79 records from 21 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0053604-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.tzcmmm
title: Occurrence Download

description: A dataset containing 6797 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "TaxonKey is Hemidactylus turcicus"
 ]
}

 The dataset includes 6797 records from 115 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0053605-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mdzpb4
title: Occurrence Download

description: A dataset listing the 2544 species recorded in GBIF matching the query:
{
 "DatasetKey" : [
 "is Computarización de la Colección Nacional de insectos Dr. Alfredo Barrera Marín del Museo de Historia Natural de la Ciudad de México (Coleoptera)"
 ]
}

 The dataset's 2544 records were derived from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0053596-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ejmafy
title: Occurrence Download

description: A dataset containing 1214022 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "and" : [
 "HasGeospatialIssue is false",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Living Specimen)"
 ]
 }
 }
 ]
 },
 "TaxonKey is one of (Moricandia foetida, Orobanche kurdica, Orobanche astragali, Terminalia erythrocarpa, Aubrieta anamasica, Aubrieta intermedia, Aubrieta scardica, Veronica arvensis, Triumfetta rhomboidea, Chevreulia pusilla, Amphipappus fremontii, Erythrina flabelliformis, Claoxylon hillii, Ornithogalum ciliiferum, Ornithogalum mysum, Ornithogalum pruinosum, Ornithogalum demirizianum, Scholtzia thinicola, Xanthosia stellata, Xanthosia singuliflora, Lafuentea jeanpertiana, Lindernia alsinoides, Melhania burchellii, Melhania damarana, Triumfetta maconochieana, Triumfetta acracantha, Sprengelia incarnata, Xanthosia peduncularis, Galium erythrorrhizon, Galium monachinii, Galium pomeranicum, Galium karliovaense, Ornithogalum nitidum, Frankenia, Frankenia, Veronica serpyllifolia, Veronica fridericae, Veronica fuhsii, Veronica multifida, Galium tricornutum, Tetratheca angulata, Cyclopia bolusii, Scholtzia multiflora, Veronica bozakmanii, Frankenia crispa, Pectis leavenworthii, Pectis stenophylla, Bertya dimerostigma, Drosera graniticola, Drosera subtilis, Galium aristatum, Galium capitatum, Galium capreum, Galium ciliare, Scholtzia capitata, Hypoxis interjecta, Hypoxis pratensis, Muhlenbergia eludens, Ornithogalum adanense, Lamium bilgilii, Lathyrus miniatus, Galium debile, Galium fissurense, Galium maritimum, Galium neglectum, Aspicarpa hirtella, Heterotheca inuloides, Orobanche zosimii, Petalostigma quadriloculare, Ornithogalum leeupoortense, Ornithogalum divergens, Ornithogalum wiedemannii, Orchigymnadenia robsonii, Pentameris dregeana, Lathyrus nivalis, Lathyrus hitchcockianus, Veronica trichadena, Xanthosia ciliata, Melhania denhamii, Alepidea peduncularis, Helicia ferruginea, Drosera, Cyclopia subternata, Perymenium fayi, Perymenium mendezii, Cosmos caudatus, Galium exsurgens, Galium laevigatum, Galium munzii, Galium oreganum, Galium papillosum, Lycopus americanus, Halophila decipiens, Rourea glabra, Veronica tenuifolia, Veronica rhodopea, Veronica peduncularis, Cyclopia burtonii, Cyclopia squamosa, Veronica caespitosa)",
 "Year is greater than or equal to 1950"
 ]
}

 The dataset includes 1214022 records from 3668 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0053587-251009101135966/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.x8ptgr
title: Occurrence Download

description: A dataset containing 1555441 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Bivalvia)",
 "BasisOfRecord is one of (Human Observation, Literature Occurrence, Living Specimen, Observation, Specimen, Occurrence evidence)",
 "Year is greater than or equal to 1979",
 "Year is less than or equal to 2020",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 1555441 records from 1413 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0344422-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/pcra-c14-1454
title: Maiak = [Lighthouse], vol. 15, no. 5 (1937)

description: [description english/roman)] Monthly
DOI: 10.15468/dl.z2ytwc
title: Occurrence Download

description: A dataset containing 8286 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((3.75878 43.96362,3.8999 43.96362,3.8999 44.04003,3.75878 44.04003,3.75878 43.96362))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Animalia"
 ]
}

 The dataset includes 8286 records from 195 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0010627-231002084531237/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/pcra-c14-1993
title: Seiatel' istiny = The sower of truth, vol. 17, no. 2 (February 1932)

description: [description english/roman)] Monthly
DOI: 10.15468/dl.4qqxrs
title: Occurrence Download

description: A dataset containing 120 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Lophura pyronota (G.R.Gray, 1841)"
 ]
}

 The dataset includes 120 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0363610-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.ekufbd
title: Occurrence Download

description: A dataset containing 163 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Country is Spain",
 "TaxonKey is Maytenus senegalensis (Lam.) Exell"
 ]
}

 The dataset includes 163 records from 29 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0019421-230828120925497/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/pcra-c14-1458
title: Maiak = [Lighthouse], vol. 15, no. 6-7 (1937)

description: [description english/roman)] Monthly
DOI: 10.15468/dl.77gjsy
title: Occurrence Download

description: A dataset containing 644 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "Country is Ethiopia",
 "Country is Eritrea",
 "Country is South Sudan",
 "Country is Sudan",
 "Country is Djibouti",
 "Country is Somalia"
 ]
 },
 "TaxonKey is Avena vaviloviana (Malzev) Mordv."
 ]
}

 The dataset includes 644 records from 11 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0127258-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.28738244.v2
title: Logic innovation

description: Logic innovation 9-pdf
DOI: 10.15468/dl.ibabph
title: Occurrence Download

description: A dataset containing 4643 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Puerto Rico",
 "HasCoordinate is true",
 "TaxonKey is Molothrus bonariensis (Gmelin, 1789)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 4643 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001681-171219132708484/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.uuzbhs
title: Occurrence Download

description: A dataset containing 6 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Paracyclotosauridae",
 "Continent is one of (North America, South America)"
 ]
}

 The dataset includes 6 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0052494-231002084531237/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/independent-c69-4443
title: Philadelphia and its police, 1987-03

description: Reports - Philadelphia Police Study Task Force. Philadelphia and its police: Toward a new partnership, 1987 March. PART OF A SERIES: The series consists of miscellaneous source materials that were collected and analyzed over the course of the Independent Commission's investigation. Included are the following: article clippings pertaining to the Rodney King incident; legal materials related to the Gates v. Board of Los Angeles Police Commissioners case, including appellate documents, court transcripts, preliminary injunctions, and briefs; black-and-white photographs; essays and articles related to police misconduct; issues of The Thin Blue Line, the Los Angeles Police Protective League's monthly publication, and Perspectives on Policing, a newsletter published by the United States Department of Justice; materials regarding policing issues in other major United States cities, including commission reports and Pate and Hamilton's book The Big Six: Policing America's Largest Cities; supplemental materials and appendices to the Independent Commission's report; requests for copies of the Commission report; transcripts from public hearings conducted by members of the Commission; and instructional materials related to the Video Incident Capture System, a video camera system that provides video and audio records of police officers' activities while on patrol.
DOI: 10.15468/dl.f7ur49
title: Occurrence Download

description: A dataset containing 345 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Hemerobius perelegans Stephens, 1836"
 ]
}

 The dataset includes 345 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0012508-240202131308920/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.mmuebd
title: Occurrence Download

description: A dataset containing 86 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Minaria refractifolia (K.Schum.) T.U.P.Konno & Rapini"
 ]
}

 The dataset includes 86 records from 22 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001681-180131172636756/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/independent-c69-4346
title: Philadelphia and its police, 1987-03

description: Reports - Philadelphia Police Study Task Force. Philadelphia and its police: Toward a new partnership, 1987 March. PART OF A SERIES: The series consists of miscellaneous source materials that were collected and analyzed over the course of the Independent Commission's investigation. Included are the following: article clippings pertaining to the Rodney King incident; legal materials related to the Gates v. Board of Los Angeles Police Commissioners case, including appellate documents, court transcripts, preliminary injunctions, and briefs; black-and-white photographs; essays and articles related to police misconduct; issues of The Thin Blue Line, the Los Angeles Police Protective League's monthly publication, and Perspectives on Policing, a newsletter published by the United States Department of Justice; materials regarding policing issues in other major United States cities, including commission reports and Pate and Hamilton's book The Big Six: Policing America's Largest Cities; supplemental materials and appendices to the Independent Commission's report; requests for copies of the Commission report; transcripts from public hearings conducted by members of the Commission; and instructional materials related to the Video Incident Capture System, a video camera system that provides video and audio records of police officers' activities while on patrol.