Liscomb Quarry (TMM/UAM): Early/Lower Maastrichtian, Alaska
collected by R. L. Liscomb, R. Gangloff, A. R. Fiorillo 1961–2007

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Bisulcocypridea sp.
Reptilia - Hadrosauridae
Lambeosaurinae indet. Parks 1923
1 specimen
DMNH 2014-12-266, supraoccipital
aff. Edmontosaurus saskatchewanensis (Sternberg 1926)
3072 specimens
MNI = 41
    = Hadrosauridae indet. Cope 1869
Davies 1987
    = Edmontosaurus sp. Lambe 1917
Fiorillo and Gangloff 2003
    = Ugrunaaluk kuukpikensis n. gen., n. sp. Mori et al. 2016
Mori et al. 2016
Reptilia - Troodontidae
Troodon sp. Leidy 1856
42 specimens
incl. AK-138-V-128 (braincase)
    = Troodon formosus Leidy 1856
Fiorillo and Gangloff 2001
Reptilia - Dromaeosauridae
Dromaeosaurus albertensis Matthew and Brown 1922
Fiorillo and Gangloff 2001 8 specimens
Reptilia - Tyrannosauridae
Carnosauria indet. Huene 1920
Davies 1987 5 specimens
    = Tyrannosauridae indet. Osborn 1906
Fiorillo and Gangloff 2001
Gastropoda
Gastropoda indet. Cuvier 1795
Fiorillo et al. 2009
Bivalvia
Bivalvia indet. Linnaeus 1758
Fiorillo et al. 2009
Ostracoda - Podocopida - Cyprididae
Cypridea sp. Bosquet 1852
Ostracoda - Podocopida - Candonidae
? Candonopsis sp. Vavra 1891
Charales - Characea
Mesochara sp. Grambast 1962
Microchara sp. Grambast 1959
see common names

Geography
Country:United States State/province:Alaska County:North Slope
Coordinates: 70.1° North, 151.6° West (view map)
Paleocoordinates:82.3° North, 127.6° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Early/Lower Maastrichtian
Age range of interval:72.10000 - 66.00000 m.y. ago
Stratigraphy
Geological group:Colville Formation:Prince Creek Member:Kogosukruk Tongue
Stratigraphic resolution:bed
Stratigraphy comments: The numerical age of the dinosaur-bearing section of the formation, where it is exposed along the lower Colville River and including the LBB, has been dated at 71–68 Ma using 40Ar/39Ar methods (McKee et al. 1989; Besse and Courtillot 1991). The age of LBB is further constrained by an 40Ar/39Ar age of 69.2±0.5 Ma from a stratigraphically underlying tuff at a locality known as Sling Point (approximately 1 km from the LBB) and from palynological analyses (Flores et al. 2007) consistent with an early Maastrichtian age (Flaig 2010).
Lithology and environment
Primary lithology:brown poorly lithified argillaceous sandstone
Secondary lithology:current ripples,pebbly,brown poorly lithified sandy siltstone
Includes fossils?Y
Lithology description: "matrix still adhering to the bones is a soft, brown, sandy silt" - also described as an "argillaceous sandstone"
Environment:crevasse splay
Geology comments: "frequent seasonal floods that were part of a complex fluvial system. Floods breached levees forming splays that often resulted in ephemeral ponds and marshy wet soils bearing lush vegetation." "Deposition occurred in trunk channels, on distributary-channel splay complexes, in interdistributary bays, and on floodplains."
Taphonomy
Modes of preservation:body
Lagerst�tten type:concentrate
Degree of concentration:-seasonal
Size of fossils:macrofossils,mesofossils
Spatial orientation:random
Preservation of anatomical detail:medium
Associated major elements:many
Disassociated major elements:many
Disassociated minor elements:many
Size sorting:poor
Fragmentation:frequent
Feeding/predation traces:tooth marks
Temporal resolution:time-averaged
Spatial resolution:parautochthonous
Collection methods and comments
Collection excludes:some macrofossils,some microfossils
Collection methods:selective quarrying,surface (float),mechanical,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:TMM
Collectors:R. L. Liscomb, R. Gangloff, A. R. Fiorillo Collection dates:1961–2007
Collection method comments: original discovery by R. L. Liscomb while working for Shell Oil Company, identified by C. Repenning (USGS) and sent to TMM; subsequent work by Univ. of Alaska Museum
Metadata
Also known as:Colville River, LBB, Liscomb Bonebed
Database number:51890
Authorizer:M. Carrano, R. Butler Enterer:M. Carrano, J. Moreno
Modifier:M. Carrano Research group:vertebrate
Created:2005-06-29 14:13:02 Last modified:2022-08-26 13:43:14
Access level:the public Released:2005-06-29 14:13:02
Creative Commons license:CC BY
Reference information

Primary reference:
12790. E. M. Brouwers, W. A. Clemens, R. A. Spicer, T. A. Ager, L. D. Carter and W. V. Sliter. 1987. Dinosaurs on the North Slope, Alaska: High latitude, latest Cretaceous environments. Science 237(4822):1608-1610 [J. Head/J. Head/P. Mannion]

Secondary references:

25679ETE A. Abbott. 2007. Tunnel vision. Nature 450:18-20 [M. Carrano/M. Carrano]
77895 A. Chinsamy, D. B. Thomas, A. R. Tumarkin-Deratzian and A. R. Fiorillo. 2012. Hadrosaurs were perennial polar residents. The Anatomical Record 295(4):610-614 [M. Carrano/M. Carrano]
82488 W. A. Clemens and L. G. Nelms. 1993. Paleoecological implications of Alaskan terrestrial vertebrate fauna in latest Cretaceous time at high paleolatitudes. Geology 21:503-506 [M. Carrano/M. Carrano]
82279 T. M. Cullen, S. Zhang, J. Spender and B. Cousens. 2022. Sr-O-C isotope signatures reveal herbivore niche-partitioning in a Cretaceous ecosystem. Palaeontology e12591 [M. Carrano/M. Carrano]
23589ETE K. L. Davies. 1987. Duck-bill dinosaurs (Hadrosauridae, Ornithischia) from the North Slope of Alaska. Journal of Paleontology 61(1):198-200 [M. Carrano/M. Carrano]
28935ETE A. R. Fiorillo. 2008. On the occurrence of exceptionally large teeth of Troodon (Dinosauria: Saurischia) from the Late Cretaceous of northern Alaska. Palaios 23(5):322-328 [M. Carrano/M. Carrano]
13817ETE A. R. Fiorillo and R. A. Gangloff. 2001. Theropod teeth from the Prince Creek Formation (Cretaceous) of northern Alaska, with speculations on Arctic dinosaur paleoecology. Journal of Vertebrate Paleontology 20(4):675-682 [M. Carrano/M. Carrano/M. Carrano]
23477ETE A. R. Fiorillo and R. Gangloff. 2003. Preliminary notes on the taphonomic and paleoecologic setting of a Pachyrhinosaurus bonebed in northern Alaska. Journal of Vertebrate Paleontology 23(3, suppl.):50A [M. Carrano/M. Carrano]
34237ETE A. R. Fiorillo, P. J. McCarthy, and P. P. Flaig. 2010. Taphonomic and sedimentologic interpretations of the dinosaur-bearing Upper Cretaceous Strata of the Prince Creek Formation, Northern Alaska: Insights from an ancient high-latitude terrestrial ecosystem. Palaeogeography, Palaeoclimatology, Palaeoecology 295:376-388 [M. Carrano/M. Carrano/M. Carrano]
29821 A. R. Fiorillo, R. S. Tykoski, P. J. Currie, P. J. McCarthy, and P. Flaig. 2009. Description of two partial Troodon braincases from the Prince Creek Formation (Upper Cretaceous), North Slope Alaska. Journal of Vertebrate Paleontology 29(1):178-187 [M. Carrano/M. Carrano]
78140 P. P. Flaig, P. J. McCarthy, and A. P. Fiorillo. 2011. A tidally influenced, high-latitude coastal-plain: the Upper Cretaceous (Maastrichtian) Prince Creek Formation, North Slope, Alaska. In S. K. Davidson, S. Leleu, & C. P. North (eds.), From River to Rock Record: The Preservation of Fluvial Sediments and Their Subsequent Interpretation. SEPM Special Publication 97:233-264 [M. Carrano/M. Carrano]
25813ETE R. Gangloff and T. R. Fiorillo. 2007. Taphonomy and paleoecology of a remarkably rich Upper Cretaceous high latitude bonebed from the Prince Creek Formation, North Slope Alaska. Journal of Vertebrate Paleontology 27(3, suppl.):79A [M. Carrano/M. Carrano]
68933 R. A. Gangloff. 2012. Dinosaurs Under the Aurora ix-176 [M. Carrano/M. Carrano/M. Carrano]
56663 H. Mori, P. S. Druckenmiller, and G. M. Erickson. 2016. A new Arctic hadrosaurid from the Prince Creek Formation (lower Maastrichtian) of northern Alaska. Acta Palaeontologica Polonica 60(1):15-32 [R. Butler/J. Moreno/M. Carrano]
80623 P. V. Ullmann, A. Shaw, R. Nellermoe and K. J. Lacovara. 2017. Taphonomy of the Standing Rock Hadrosaur Site, Corson County, South Dakota. Palaios 32:779-796 [M. Carrano/M. Carrano]