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  • Arizona Board of Regents  (2,511)
  • American Chemical Society
  • Elsevier
  • Periodicals Archive Online (PAO)
  • Wiley
  • English  (2,512)
  • 1
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    Pedogenic carbonates as a proxy for palaeo-CO2 in the Palaeozoic atmosphere (2010)
    Elsevier
    Details
    Publication Date: 2021-03-29
    Description: According to a model by Cerling (1991, 1999), the carbon isotope composition of calcretes should depend on the soil type and the CO2-concentration in the atmosphere. We have tested Cerling’s model by investigating 14 Palaeozoic sections with soil profiles. A large number of carbonate types of different genetic origin exist in the localities examined. Comparing the Palaeozoic samples with recent and subrecent calcretes, it can be demonstrated that anhedral, cryptocrystalline (〈10 μm) and subhedral microcrystalline (10 - 40 μm) carbonates are clearly of pedogenic origin. Crystals of larger size with a poikilotopic texture are of groundwater or burial diagenetic origin. Macro- and micromorphological features, typical of recent calcretes, occur in several soil profiles, but thin section microscopy reveals a strong diagenetic overprint of most pedogenic carbonates. Time equivalent sections with comparable soil types (protosols, calcisols and vertisols) show large variations in carbon isotope composition. On the other hand, different carbonate generations at one site do not differ much. Therefore Palaeozoic calcretes appear to be unsuitable for a deduction of the Palaeozoic CO2-concentration.
    Description: German Research Foundation (DFG)
    Description: research
    Keywords: 551.9 ; 552.5 ; VKB 350 ; VJJ 110 ; VCA 300 ; VKB 332 ; VKA 300 ; VKB 371 ; VEA 000 ; VKB 372 ; Lithogenese {Sedimentologie} ; Geochemie der Stabilen Isotopen ; Paläozoische Geologie ; Sedimentationsbedingungen ; Petrogenese ; Klastische Sedimentgesteine ; Europa insgesamt {Geologie} ; Karbonatische Sedimentgesteine ; Kohlenstoffkreislauf ; C-isotope ; Jungpaläozoikum ; Paläopedologie ; Kalkkruste ; CO2 ; calcrete ; carbon cycle ; upper Paleozoic ; paleosol ; C-13/C-12 ; Europa ; paläoklima ; Europe ; 38.41 ; 38.61 ; 38.32
    Language: English
    Type: article
    Format: application/pdf
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    CITATION GEO-LEO
  • 2
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    Man in Suit Pulling in Dredging Net 1923 (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives
    Details
    Publication Date: 2023-01-12
    Description: Man holding metal dreding net off side of boat, out on the water. He is in a suit and hat.
    Description: Photographs
    Keywords: People
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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    PAPER (OA)
  • 3
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    Untitled (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives
    Details
    Publication Date: 2023-01-12
    Description: Black and white photo of two cuttlefish on the seafloor with one cuttlefish in the background.
    Description: Photographs
    Keywords: Organisms
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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  • 4
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    Inside Cover Biological Materials No. 57 (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives
    Details
    Publication Date: 2023-01-12
    Description: Inside cover of supply department's catalogue of specimens for sale. Has horshoe crab drawing and text reads Biological Materials, the test of years, est. 1890, Catalogue No. 57 A large stock of living and preserved materials for Zoology, Botany, and Embryology. Supply Department Marine Biological Laboratory
    Description: Photographs
    Keywords: Publications ; Organisms
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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  • 5
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    Gemma docked outside MRC at MRC opening 1992 (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives
    Details
    Publication Date: 2023-01-12
    Description: View of the Gemma docked outside the MRC, with MRC visible in background at the time of the MRC opening
    Description: Photographs
    Keywords: Campus
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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  • 6
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    Photograph of Edwin Grant Conklin (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives
    Details
    Publication Date: 2023-01-12
    Description: Black and white photograph of Edwin Grant Conklin
    Description: Conklin is wearing a suit and seated with his left leg up. His hands are clasped above his left knee. Conklin is looking at the camera.
    Description: Photographs
    Keywords: People
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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  • 7
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    Photograph of Edwin Grant Conklin (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives
    Details
    Publication Date: 2023-01-12
    Description: Black and white photograph of Edwin Grant Conklin
    Description: Conklin is at his house in woods hole, sitting on a chair on the lawn.
    Description: Photographs
    Keywords: People
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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  • 8
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    Photograph of Charles Otis Whitman reading a book (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives
    Details
    Publication Date: 2023-01-12
    Description: Black and white photograph of Charles Otis Whitman
    Description: Whitman is seated in a wooden chair, sitting back and reading a book. His chair is in front of a desk that is covered in books and papers.
    Description: Photographs
    Keywords: People
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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  • 9
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    1900 MBL evening lectures list (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  MBL Archives, Box 47, Folder 6
    Details
    Publication Date: 2023-01-12
    Description: Handwritten list of evening lectures at the MBL in 1900
    Description: List contains the subject, date, name of presenter, and institution of each presenter
    Description: Correspondence
    Keywords: Lectures
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
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  • 10
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    Embryology Course Photo in 2013 (2017)
    Arizona Board of Regents | Marine Biological Laboratory Archives
    In:  Loeb Laboratory, Marine Biological Laboratory, Woods Hole, MA
    Details
    Publication Date: 2023-01-12
    Description: Color photograph
    Description: photograph of 2013 Embryology Course class and key
    Description: 2 images
    Description: Photograph
    Keywords: People
    Repository Name: Woods Hole Open Access Server
    Language: English
    Type: Still Image
    Format: image/tiff
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