Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W1997434142', 'doi': 'https://doi.org/10.1130/0091-7613(2001)029<0303:efasbr>2.0.co;2', 'title': 'Evidence for a small (∼0.000&hairsp;030) but resolvable increase in seawater 87Sr/86Sr ratios across the Cretaceous-Tertiary boundary', 'display_name': 'Evidence for a small (∼0.000&hairsp;030) but resolvable increase in seawater 87Sr/86Sr ratios across the Cretaceous-Tertiary boundary', 'publication_year': 2001, 'publication_date': '2001-01-01', 'ids': {'openalex': 'https://openalex.org/W1997434142', 'doi': 'https://doi.org/10.1130/0091-7613(2001)029<0303:efasbr>2.0.co;2', 'mag': '1997434142'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1130/0091-7613(2001)029<0303:efasbr>2.0.co;2', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S56162041', 'display_name': 'Geology', 'issn_l': '0091-7613', 'issn': ['0091-7613', '1943-2682'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319845', 'host_organization_name': 'Geological Society of America', 'host_organization_lineage': ['https://openalex.org/P4310319845'], 'host_organization_lineage_names': ['Geological Society of America'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5041891186', 'display_name': 'Kenneth G. MacLeod', 'orcid': 'https://orcid.org/0000-0002-6016-0837'}, 'institutions': [{'id': 'https://openalex.org/I76835614', 'display_name': 'University of Missouri', 'ror': 'https://ror.org/02ymw8z06', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I76835614']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Kenneth G. MacLeod', 'raw_affiliation_strings': ['*** Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211 USA'], 'affiliations': [{'raw_affiliation_string': '*** Department of Geological Sciences, University of Missouri, Columbia, Missouri 65211 USA', 'institution_ids': ['https://openalex.org/I76835614']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5038391692', 'display_name': 'Brian T. Huber', 'orcid': 'https://orcid.org/0000-0002-0929-3175'}, 'institutions': [{'id': 'https://openalex.org/I103187081', 'display_name': 'Smithsonian Institution', 'ror': 'https://ror.org/01pp8nd67', 'country_code': 'US', 'type': 'government', 'lineage': ['https://openalex.org/I103187081']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Brian T. Huber', 'raw_affiliation_strings': ['Department of Paleobiology, MRC: NHB-121, Smithsonian Institution, Washington, D.C. 20560, USA'], 'affiliations': [{'raw_affiliation_string': 'Department of Paleobiology, MRC: NHB-121, Smithsonian Institution, Washington, D.C. 20560, USA', 'institution_ids': ['https://openalex.org/I103187081']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5059716561', 'display_name': 'Paul D. Fullagar', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I114027177', 'display_name': 'University of North Carolina at Chapel Hill', 'ror': 'https://ror.org/0130frc33', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I114027177']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Paul D. Fullagar', 'raw_affiliation_strings': ['Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599, USA'], 'affiliations': [{'raw_affiliation_string': 'Department of Geological Sciences, University of North Carolina, Chapel Hill, North Carolina 27599, USA', 'institution_ids': ['https://openalex.org/I114027177']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 3, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': 6.904, 'has_fulltext': False, 'cited_by_count': 52, 'citation_normalized_percentile': {'value': 0.840464, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 92, 'max': 93}, 'biblio': {'volume': '29', 'issue': '4', 'first_page': '303', 'last_page': '303'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10109', 'display_name': 'Paleontology and Stratigraphy of Fossils', 'score': 0.9994, 'subfield': {'id': 'https://openalex.org/subfields/1911', 'display_name': 'Paleontology'}, 'field': {'id': 'https://openalex.org/fields/19', 'display_name': 'Earth and Planetary Sciences'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, 'topics': [{'id': 'https://openalex.org/T10109', 'display_name': 'Paleontology and Stratigraphy of Fossils', 'score': 0.9994, 'subfield': {'id': 'https://openalex.org/subfields/1911', 'display_name': 'Paleontology'}, 'field': {'id': 'https://openalex.org/fields/19', 'display_name': 'Earth and Planetary Sciences'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T10017', 'display_name': 'Geology and Paleoclimatology Research', 'score': 0.9912, 'subfield': {'id': 'https://openalex.org/subfields/1902', 'display_name': 'Atmospheric Science'}, 'field': {'id': 'https://openalex.org/fields/19', 'display_name': 'Earth and Planetary Sciences'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}, {'id': 'https://openalex.org/T10001', 'display_name': 'Geological and Geochemical Analysis', 'score': 0.9866, 'subfield': {'id': 'https://openalex.org/subfields/1908', 'display_name': 'Geophysics'}, 'field': {'id': 'https://openalex.org/fields/19', 'display_name': 'Earth and Planetary Sciences'}, 'domain': {'id': 'https://openalex.org/domains/3', 'display_name': 'Physical Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/geological-survey', 'display_name': 'Geological survey', 'score': 0.5219411}, {'id': 'https://openalex.org/keywords/chapel', 'display_name': 'Chapel', 'score': 0.48897684}], 'concepts': [{'id': 'https://openalex.org/C2778805511', 'wikidata': 'https://www.wikidata.org/wiki/Q1713', 'display_name': 'Citation', 'level': 2, 'score': 0.6053915}, {'id': 'https://openalex.org/C127313418', 'wikidata': 'https://www.wikidata.org/wiki/Q1069', 'display_name': 'Geology', 'level': 0, 'score': 0.550572}, {'id': 'https://openalex.org/C161191863', 'wikidata': 'https://www.wikidata.org/wiki/Q199655', 'display_name': 'Library science', 'level': 1, 'score': 0.54289544}, {'id': 'https://openalex.org/C2781113848', 'wikidata': 'https://www.wikidata.org/wiki/Q2915366', 'display_name': 'Geological survey', 'level': 2, 'score': 0.5219411}, {'id': 'https://openalex.org/C2779446402', 'wikidata': 'https://www.wikidata.org/wiki/Q4036051', 'display_name': 'Chapel', 'level': 2, 'score': 0.48897684}, {'id': 'https://openalex.org/C12294951', 'wikidata': 'https://www.wikidata.org/wiki/Q44626', 'display_name': 'Cretaceous', 'level': 2, 'score': 0.4627182}, {'id': 'https://openalex.org/C166957645', 'wikidata': 'https://www.wikidata.org/wiki/Q23498', 'display_name': 'Archaeology', 'level': 1, 'score': 0.3971673}, {'id': 'https://openalex.org/C151730666', 'wikidata': 'https://www.wikidata.org/wiki/Q7205', 'display_name': 'Paleontology', 'level': 1, 'score': 0.32907456}, {'id': 'https://openalex.org/C95457728', 'wikidata': 'https://www.wikidata.org/wiki/Q309', 'display_name': 'History', 'level': 0, 'score': 0.26852834}, {'id': 'https://openalex.org/C52119013', 'wikidata': 'https://www.wikidata.org/wiki/Q50637', 'display_name': 'Art history', 'level': 1, 'score': 0.26187015}, {'id': 'https://openalex.org/C41008148', 'wikidata': 'https://www.wikidata.org/wiki/Q21198', 'display_name': 'Computer science', 'level': 0, 'score': 0.15507412}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1130/0091-7613(2001)029<0303:efasbr>2.0.co;2', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S56162041', 'display_name': 'Geology', 'issn_l': '0091-7613', 'issn': ['0091-7613', '1943-2682'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319845', 'host_organization_name': 'Geological Society of America', 'host_organization_lineage': ['https://openalex.org/P4310319845'], 'host_organization_lineage_names': ['Geological Society of America'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [{'display_name': 'Life below water', 'score': 0.69, 'id': 'https://metadata.un.org/sdg/14'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 12, 'referenced_works': ['https://openalex.org/W1972063511', 'https://openalex.org/W1979790560', 'https://openalex.org/W1988330022', 'https://openalex.org/W2002736216', 'https://openalex.org/W2005819542', 'https://openalex.org/W2036849457', 'https://openalex.org/W2041691399', 'https://openalex.org/W2055311296', 'https://openalex.org/W2081525814', 'https://openalex.org/W2092415935', 'https://openalex.org/W2100271992', 'https://openalex.org/W2146704021'], 'related_works': ['https://openalex.org/W3191324057', 'https://openalex.org/W2808650887', 'https://openalex.org/W2800531900', 'https://openalex.org/W2762997592', 'https://openalex.org/W2615026871', 'https://openalex.org/W2113750225', 'https://openalex.org/W2089554208', 'https://openalex.org/W2023531618', 'https://openalex.org/W1991543154', 'https://openalex.org/W1867594322'], 'abstract_inverted_index': {'Research': [0], 'Article|': [1], 'April': [2], '01,': [3], '2001': [4], 'Evidence': [5, 249], 'for': [6, 40, 68, 99, 250], 'a': [7, 251, 349], 'small': [8, 252], '(∼0.000': [9, 253], '030)': [10, 254], 'but': [11, 255], 'resolvable': [12, 256], 'increase': [13, 257, 351], 'in': [14, 258, 355, 426], 'seawater': [15, 259, 356], '87Sr/86Sr': [16, 260, 312, 412], 'ratios': [17, 261, 359], 'across': [18, 262, 314, 360], 'the': [19, 263, 315, 361, 381, 386, 394, 411, 427, 430], 'Cretaceous-Tertiary': [20, 264, 316], 'boundary': [21, 318], 'Kenneth': [22, 25, 113, 240], 'G.': [23, 26, 114, 241], 'MacLeod;': [24], 'MacLeod': [27, 115], '1Department': [28, 116], 'of': [29, 33, 57, 85, 89, 117, 121, 131, 145, 149, 161, 189, 311, 324, 352, 385, 406, 429], 'Geological': [30, 86, 118, 146, 159, 187], 'Sciences,': [31, 87, 119, 147], 'University': [32, 88, 120, 148], 'Missouri,': [34, 122], 'Columbia,': [35, 123], 'Missouri': [36, 124], '65211,': [37, 125], 'USA': [38, 66, 97, 126, 140, 157], 'Search': [39, 67, 98, 237, 288, 295, 305, 307], 'other': [41, 69, 100], 'works': [42, 70, 101], 'by': [43, 71, 102, 417], 'this': [44, 72, 103, 370, 439], 'author': [45, 73, 104], 'on:': [46, 74, 105], 'GSW': [47, 75, 106], 'Google': [48, 76, 107], 'Scholar': [49, 77, 108], 'Brian': [50, 53, 127, 243], 'T.': [51, 54, 128, 244], 'Huber;': [52], 'Huber': [55, 129], '2Department': [56, 130], 'Paleobiology,': [58, 132], 'MRC:': [59, 133], 'NHB-121,': [60, 134], 'Smithsonian': [61, 135], 'Institution,': [62, 136], 'Washington,': [63, 137], 'D.C.': [64, 138], '20560,': [65, 139], 'Paul': [78, 81, 141, 246], 'D.': [79, 82, 142, 247], 'Fullagar': [80, 83, 143], '3Department': [84, 144], 'North': [90, 94, 150, 154], 'Carolina,': [91, 151], 'Chapel': [92, 152], 'Hill,': [93, 153], 'Carolina': [95, 155], '27599,': [96, 156], 'Author': [109], 'and': [110, 335, 343, 374], 'Article': [111, 197], 'Information': [112], 'Publisher:': [158], 'Society': [160, 188], 'America': [162, 190], 'Received:': [163, 168, 199, 204], '31': [164, 200], 'Jul': [165, 201], '2000': [166, 171, 175, 202, 207, 211], 'Revision': [167, 203], '07': [169, 205], 'Dec': [170, 174, 206, 210], 'Accepted:': [172, 208], '11': [173, 209], 'First': [176, 212], 'Online:': [177, 213], '02': [178, 214], 'Jun': [179, 215], '2017': [180, 216], 'Online': [181], 'ISSN:': [182, 185], '1943-2682': [183], 'Print': [184], '0091-7613': [186], 'Geology': [191, 266], '(2001)': [192], '29': [193, 268], '(4):': [194, 269], '303–306.': [195, 270], 'https://doi.org/10.1130/0091-7613(2001)029<0303:EFASBR>2.0.CO;2': [196, 272], 'history': [198], 'Cite': [217], 'View': [218], 'This': [219], 'Citation': [220, 223, 239], 'Add': [221], 'to': [222, 423, 438, 443], 'Manager': [224], 'Share': [225, 227], 'Icon': [226, 233], 'Facebook': [228], 'Twitter': [229], 'LinkedIn': [230], 'MailTo': [231], 'Tools': [232, 234], 'Get': [235], 'Permissions': [236], 'Site': [238], 'MacLeod,': [242], 'Huber,': [245], 'Fullagar;': [248], 'boundary.': [265], '2001;;': [267], 'doi:': [271], 'Download': [273], 'citation': [274], 'file:': [275], 'Ris': [276], '(Zotero)': [277], 'Refmanager': [278], 'EasyBib': [279], 'Bookends': [280], 'Mendeley': [281], 'Papers': [282], 'EndNote': [283], 'RefWorks': [284], 'BibTex': [285], 'toolbar': [286, 291], 'search': [287, 292, 293, 301], 'Dropdown': [289], 'Menu': [290], 'input': [294, 296], 'auto': [297], 'suggest': [298], 'filter': [299], 'your': [300, 444], 'All': [302], 'ContentBy': [303], 'SocietyGeology': [304], 'Advanced': [306], 'Abstract': [308], 'Previous': [309], 'studies': [310], 'patterns': [313], '(K-T)': [317], 'have': [319, 436, 452], 'generated': [320], 'inconsistent': [321], 'results.': [322], 'Analyses': [323], 'samples': [325], 'from': [326], 'Ocean': [327], 'Drilling': [328], 'Program': [329], 'Hole': [330], '1049C': [331], 'provide': [332], 'better': [333], 'taphonomic': [334], 'diagenetic': [336, 378], 'control': [337], 'than': [338, 400], 'has': [339], 'been': [340], 'previously': [341], 'achieved': [342], 'indicate': [344], '(1)': [345], 'that': [346, 365, 376], 'there': [347], 'was': [348], 'rapid': [350], '∼0.000': [353], '030': [354], '87Sr/': [357], '86Sr': [358], 'K-T': [362, 431], 'boundary,': [363], '(2)': [364], 'post–K-T': [366], 'Cretaceous': [367, 407], 'foraminifera': [368], 'at': [369], 'site': [371], 'are': [372, 391], 'reworked,': [373], '(3)': [375], 'subtle': [377], 'overprinting': [379], 'affects': [380], 'basal': [382], '∼15': [383], 'cm': [384], 'Danian': [387], 'ooze.': [388], 'These': [389], 'conclusions': [390], 'consistent': [392], 'with': [393], 'asteroid': [395], 'impact': [396], 'hypothesis.': [397], 'Reworking': [398], 'rather': [399], 'survivorship': [401], 'confirms': [402], 'nearly': [403], 'complete': [404], 'extinction': [405], 'Tethyan': [408], 'planktic': [409], 'foraminifera;': [410], 'excursion': [413], 'can': [414], 'be': [415], 'explained': [416], 'enhanced': [418], 'continental': [419], 'weathering,': [420], 'perhaps': [421], 'related': [422], 'acid': [424], 'rain': [425], 'aftermath': [428], 'impact.': [432], 'You': [433], 'do': [434], 'not': [435], 'access': [437], 'content,': [440], 'please': [441], 'speak': [442], 'institutional': [445], 'administrator': [446], 'if': [447], 'you': [448, 450], 'feel': [449], 'should': [451], 'access.': [453]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1997434142', 'counts_by_year': [{'year': 2021, 'cited_by_count': 2}, {'year': 2020, 'cited_by_count': 1}, {'year': 2019, 'cited_by_count': 1}, {'year': 2018, 'cited_by_count': 2}, {'year': 2016, 'cited_by_count': 1}, {'year': 2015, 'cited_by_count': 1}, {'year': 2014, 'cited_by_count': 1}, {'year': 2013, 'cited_by_count': 4}, {'year': 2012, 'cited_by_count': 1}], 'updated_date': '2024-12-10T11:25:13.867873', 'created_date': '2016-06-24'}