Moscow Landing, Tombigbee River: Late/Upper Maastrichtian, Alabama

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Coccolithophyceae - Microrhabdulaceae
Lithraphidites quadratus Bramlette and Martini 1964
Cephalopoda - Ammonitida - Scaphitidae
Hoploscaphites sp. Nowak 1911
Trachyscaphites alabamensis Cobban and Kennedy 1995
Discoscaphites gulosus (Morton 1834)
Discoscaphites minardi Landman et al. 2004
Discoscaphites conradi (Morton 1834)
Cephalopoda - Ammonitida - Baculitidae
Baculites sp. Lamarck 1799
Eubaculites labyrinthicus (Morton 1834)
Eubaculites latecarinatus (Brunnschweiler 1966)
Eubaculites carinatus (Morton 1834)
Trachybaculites columna (Morton 1834)
Cephalopoda - Ammonitida - Diplomoceratidae
Glyptoxoceras sp. Spath 1925
Dinophyceae - Peridiniales - Peridiniaceae
Deflandrea galeata Lejeune-Carpentier 1942
see common names

Geography
Country:United States State/province:Alabama County:Summer
Coordinates: 32.4° North, 88.0° West (view map)
Paleocoordinates:35.9° North, 66.0° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Late/Upper Maastrichtian Nannofossil zone: CC25b
Age range of interval:72.10000 - 66.00000 m.y. ago
Stratigraphy
Formation:Prairie Bluff Chalk
Stratigraphic resolution:formation
Lithology and environment
Primary lithology:bioturbation silty marl
Lithology description: "The “Moscow Landing” site has been widely studied (e.g., Smith, 1997; Mancini and Puckett, 2005; Wawak, 2007; Hartet al., 2013). It preserves an extensive exposure of the K/Pg boundary with a unique record of the impact-generated tsunami event. The western bank of the Tombigbee River exposes a mixed carbonate-siliciclastic sequence of the Maastrichtian Prairie Bluff Chalk unconformably overlain by the Paleocene Clayton Formation.The Prairie Bluff Chalk is a 3.1 m thick white to light-gray, massive, extensively bioturbated, micaceous chalky to silty marlstone. Aphosphatic macrofossil bed (PMB) (after Smith, 1997) occurs approximately ~1 m (or ~2 m in places) below the top of the Prairie Bluff Chalk. It has been interpreted as a surface of maximum transgression (maximum flooding surface) based on biostratigraphy, taphonomy and sequence stratigraphy (Mancini et al., 1996; Smith,1997; Puckett, 2005; Naujokaityte et al., 2014). The PMB is a~25 cm thick, semi-clast-supported bed with abundant phosphatic nodules, and reworked, abraded, and predominantly phosphatized internal molds of a diverse molluscan assemblage.A second shell bed(“lower shell bed”) is present 50 cm below the PMB. In contrast to the PMB, the lower shell bed is a 10 cm thick matrix-supported bed with a less diverse fauna (predominantly Exogyra sp., and Pycnodonte sp.) and lacks phosphatic nodules. The formational contact varies from heavily bioturbated to sharp (near the clastic unit). In this area, the Clayton Formation consists of two-dominant facies: 1. Light gray sandy marl with P. pulaskensis (bioturbated contact). 2. Channel fill quartz-rich sand (clastic unit) with Prairie Bluff Chalk rip-ups and impact spherules (sharp contact) (Hart et al., 2013)." (Larina et al. 2016)
Environment:marginal marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils,microfossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:AMNH
Taxonomic list comments:Taxon abundances by bed can be found in the original reference
Metadata
Also known as:AMNH Loc. 3570
Database number:205799
Authorizer:A. Dunhill Enterer:B. Allen
Modifier:P. Wagner
Created:2019-10-22 10:27:25 Last modified:2024-03-15 17:47:14
Access level:the public Released:2019-10-22 10:27:25
Creative Commons license:CC BY
Reference information

Primary reference:
70564. E. Larina, M. Garb, N. Landman, N. Dastas, N. Thibault, L. Edwards, G. Phillips, R. Rovelli, C. Myers and J. Naujokaityte. 2016. Upper Maastrichtian ammonite biostratigraphy of the Gulf Coastal Plain (Mississippi Embayment, southern USA). Cretaceous Research 60:128-151 [A. Dunhill/B. Allen]