Cephalopods from the Cretaceous/Tertiary Boundary Interval on the Atlantic Coastal Plain, with a Description of the Highest Ammonite Zones in North America. Part 1. Maryland and North Carolina

Landman, Neil H.; Johnson, R.; Edwards, Lucy E.

doi:10.1206/0003-0082(2004)454<0001:cfttbi>2.0.co;2

Cited by 43 publications

(83 citation statements)

References 29 publications

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“…The Owl Creek fm. was assigned to calcareous nannofossil zone CC26b (45), which provides a conservative estimate that deposition occurred within the last 1.3 My of the Cretaceous (46). Specimen Collection.…”

Section: Methodsmentioning

confidence: 99%

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

Sessa

Larina

Knoll

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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Ammonites are among the best-known fossils of the Phanerozoic, yet their habitat is poorly understood. Three common ammonite families (Baculitidae, Scaphitidae, and Sphenodiscidae) co-occur with wellpreserved planktonic and benthic organisms at the type locality of the upper Maastrichtian Owl Creek Formation, offering an excellent opportunity to constrain their depth habitats through isotopic comparisons among taxa. Based on sedimentary evidence and the micro-and macrofauna at this site, we infer that the 9-m-thick sequence was deposited at a paleodepth of 70-150 m. Taxa present throughout the sequence include a diverse assemblage of ammonites, bivalves, and gastropods, abundant benthic foraminifera, and rare planktonic foraminifera. No stratigraphic trends are observed in the isotopic data of any taxon, and thus all of the data from each taxon are considered as replicates. Oxygen isotope-based temperature estimates from the baculites and scaphites overlap with those of the benthos and are distinct from those of the plankton. In contrast, sphenodiscid temperature estimates span a range that includes estimates of the planktonic foraminifera and of the warmer half of the benthic values. These results suggest baculites and scaphites lived close to the seafloor, whereas sphenodiscids sometimes inhabited the upper water column and/or lived closer to shore. In fact, the rarity and poorer preservation of the sphenodiscids relative to the baculites and scaphites suggests that the sphenodiscid shells may have only reached the Owl Creek locality by drifting seaward after death.A mmonites have constituted a primary data source for the fields of evolution, paleoceanography, biostratigraphy, and paleoecology for more than a century; their ubiquity, diversity, occurrence in a wide variety of marine environments, and readily preservable shell account for their utility in both paleontological and geological studies. Ammonites have been used extensively in studies of heterochrony because their shells preserve distinct ontogenetic changes that can be tracked in evolving lineages (1, 2); they are valued in paleoceanographic research because, like most mollusks, they are inferred to have precipitated their aragonitic shells in isotopic equilibrium with the surrounding seawater (3, 4). Thus, shell chemistry may record temperature, via oxygen isotopes (δ 18 O) (5), and water mass properties, such as strontium isotopes ( 87 Sr/ 86 Sr), which are used to estimate numerical age (6). Ammonites are also a textbook example of an index fossil; besides being abundant and widespread, they evolved rapidly, making them the dominant Mesozoic tool for relative dating and correlation of shallow water strata. For example, the 35-My-long stratigraphic record of Upper Cretaceous deposits in the US Western Interior Seaway (WIS) has been partitioned into 66 ammonite zones (7). Finally, ammonites underwent a spectacular extinction at the close of the Mesozoic. Explanations for why the ammonites, which were flourishing immediately before the Cretaceous-P...

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Section: Methodsmentioning

confidence: 99%

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

Sessa

Larina

Knoll

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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“…We predict that future work will uncover additional evidence of "western" vertebrate clades in Appalachia; in particular, careful placement within a geological context will help to establish the exact timing and tempo of the seaway retreat . 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 Cobban andKennedy (1991a,b, 1995;1993), Landman et al (2004), andLarina et al (2016). The relationship of GCP to WIS ammonite zones as presented here should be considered provisional.…”

Section: Discussionmentioning

confidence: 85%

The first reported ceratopsid dinosaur from eastern North America (Owl Creek Formation, Upper Cretaceous, Mississippi, USA)

Farke¹,

Phillips

2017

Preprint

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Ceratopsids (“horned dinosaurs”) are known from western North America and Asia, a distribution reflecting an inferred subaerial link between the two landmasses during the Late Cretaceous. However, this clade was previously unknown from eastern North America, presumably due to limited outcrop of the appropriate age and depositional environment as well as the separation of eastern and western North America by the Western Interior Seaway during much of the Late Cretaceous. A dentary tooth from the Owl Creek Formation (late Maastrichtian) of Union County, Mississippi, represents the first reported occurrence of Ceratopsidae from eastern North America. This tooth shows a combination of features typical of Ceratopsidae, including a double root and a prominent, blade-like carina. Based on the age of the fossil, we hypothesize that it is consistent with a dispersal of ceratopsids into eastern North America during the very latest Cretaceous, presumably after the two halves of North America were reunited following the retreat of the Western Interior Seaway.

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“…S. inornata has a Danian age assignment and an absolute age of 64.95-62.6 Ma in Northern Hemisphere mid-latitudes [68]. Although this age has not been adjusted like the previous taxa discussed, its FO still marks the early Danian and it is commonly used as a K-Pg boundary marker [6,51,55]. Specimens that we counted and identified as S. inornata also have spherical wall layers, and only resemble the holotype.…”

Section: Senoniasphaera Inornata Figure 5o-qmentioning

confidence: 91%

“…Danian species commonly used as global indicators to identify the early Danian or used to mark the K-Pg boundary are: Carpatella cornuta; Damassadinium californicum; Senoniasphaera inornata; Xenicodinium lubricum; Lanternosphaeridium reinhardtii and most species of Hafniasphaera (e.g., H. hyalospinosa) [6,41,43,44,47,54,55,68,69]. Firth [41] noted that the K-Pg boundary could be approximated by the highest occurrence of P. grallator.…”

Section: Index Species For the Early Danian And The K-pg Boundarymentioning

confidence: 99%

“…He further divided the S. inornata Subzone into three different zonules in this order: the C. cornuta Zonule, Tectatodinium rugulatum (= Xenicodinium rugulatum) Zonule and the Xenicodinium lubricum Zonule. According to Hansen [47,48], the lower boundary of the S. inornata Subzone ranges before the Danian, and into the uppermost Maastrichtian P. grallator Zone, a conclusion that probably resulted from an identification error [50,55]. The first occurrence of P. grallator identifies the P. grallator Zone, which has been established from studies done in the North Sea [65].…”

Section: Index Species For the Early Danian And The K-pg Boundarymentioning

confidence: 99%

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Cretaceous-Paleogene Dinoflagellate Biostratigraphy and the Age of the Clayton Formation, Southeastern Missouri, USA

2014

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Sedimentary deposits in Stoddard County, southeastern Missouri, reveal a K-Pg transition sequence represented by the uppermost Maastrichtian Owl Creek Formation and the Paleocene Clayton Formation. The Clayton Formation is characterized by a basal fossiliferous coquinite that contains reworked late Maastrichtian macrofossils. Dinoflagellate biostratigraphy is used to determine the age of the coquinite layer and specifically whether or not it is an end-K tsunamite deposit resulting from the Chicxulub impact event. Results indicate a mixed assemblage of late Maastrichtian and early Danian dinocysts within the basal coquinite of the Clayton Formation. Maastrichtian dinocyst taxa identified are Riculacysta amplexa, Pierceites pentagonus, Phelodinium tricuspe and Dinogymnium sp. and dinocysts utilized as global indicators of the basal Danian, also present in the coquinite, consist of Senoniasphaera inornata, Carpatella cornuta, Damassadinium californicum, and Lanternosphaeridium reinhardtii. A gray mud occurring above the coquinite in the middle of the Clayton Formation contains the mid-Danian dinoflagellate Senegalinium iterlaaense. Collectively, these data suggest that the coquinite was deposited well after the K-Pg event but before the middle Danian. The mixed assemblage of Late Cretaceous and Paleocene dinocysts preserved in the coquinite weakens the hypothesis that it is an end-K tsunamite deposit and suggests instead that it may result from a long-term transgressive lag. We also extend the stratigraphic range of the Paleocene Senegalinium simplex downward into the uppermost Maastrichtian. OPEN ACCESSGeosciences 2014, 4 2

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Cephalopods from the Cretaceous/Tertiary Boundary Interval on the Atlantic Coastal Plain, with a Description of the Highest Ammonite Zones in North America. Part 1. Maryland and North Carolina

Cited by 43 publications

References 29 publications

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

Ammonite habitat revealed via isotopic composition and comparisons with co-occurring benthic and planktonic organisms

The first reported ceratopsid dinosaur from eastern North America (Owl Creek Formation, Upper Cretaceous, Mississippi, USA)

Cretaceous-Paleogene Dinoflagellate Biostratigraphy and the Age of the Clayton Formation, Southeastern Missouri, USA

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