Bull Run Formation

{{Short description|Geological formation in the United States}}

{{Infobox rockunit

| name = Bull Run Formation

| image =

| caption =

| type = Geological formation

| age = Norian
~{{fossil range|222|210}}

| period = Norian

| prilithology = Mudstone

| otherlithology = Shale, siltstone

| namedfor =

| namedby =

| region = Maryland, Virginia

| country = United States

| coordinates = {{coord|38.9|N|77.4|W|display=inline,title}}

| paleocoordinates = {{coord|13.3|N|21.8|W|display=inline}}

| unitof = Chatham Group

| subunits = Ball's Bluff & Groveton Members

| underlies =

| overlies =

| thickness =

| extent = Culpeper Basin

| area =

| map = {{Location map+ | United States#Virginia

| relief = 1

| width = 250

| float = center

| places =

{{Location map~ | United States#Virginia

| lat_deg = 38.9

| lon_deg = -77.4

| mark = Pink ff0080 pog.svg

| marksize = 10

}}

}}

| map_caption =

}}

The Bull Run Formation is a Late Triassic (Norian) stratigraphic unit in the eastern United States.[https://paleobiodb.org/classic/displayCollResults?geological_group=Chatham&formation=Bull%20Run Bull Run Formation] at Fossilworks.org Fossil fish bones and scales have been found in outcrops of the formation's Groveton Member in Manassas National Battlefield Park.Hunt et al., 2006, p.64 Indeterminate fossil ornithischian tracks have been reported from the formation.Weishampel et al., 2004, pp.517-607

The Bull Run Formation was once considered part of the Culpeper Group of the Newark Supergroup, but the United States Geological Survey no longer formally recognizes this formation (it is abandoned).[https://ngmdb.usgs.gov/Geolex/Units/BullRun_715.html Bull Run], National Geologic Map Database, Geolex — Unit Summary, USGS.

Fossil content

See also

References

{{reflist|2}}

= Bibliography =

  • Hunt, ReBecca K., Vincent L. Santucci and Jason Kenworthy. 2006. "A preliminary inventory of fossil fish from National Park Service units." in S.G. Lucas, J.A. Spielmann, P.M. Hester, J.P. Kenworthy, and V.L. Santucci (ed.s), Fossils from Federal Lands. New Mexico Museum of Natural History and Science Bulletin 34, pp. 63–69
  • R. E. Weems. 2006. The manus print of Kayentapus minor: its bearing on the biomechanics and ichnotaxonomy of early Mesozoic saurischian dinosaurs. In J. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner, & J. I. Kirkland (eds.), The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37:369-378
  • {{citation |last1=Weishampel |first1=David B. |author2-link=Peter Dodson |last2=Dodson |first2=Peter |author3-link=Halszka Osmólska |last3=Osmólska |first3=Halszka |year=2004 |title=The Dinosauria, 2nd edition |url=https://books.google.com/books?id=vtZFDb_iw40C |publisher=Berkeley: University of California Press |pages=1–880 |accessdate=2019-02-21 |isbn=0-520-24209-2 |author1-link=David B. Weishampel }}
  • R. E. Weems and P. G. Kimmel. 1993. Upper Triassic reptile footprints and a coelacanth fish scale from the Culpeper Basin, Virginia. Proceedings of the Biological Society of Washington 16(2):390-401
  • J. R. Smith. 1982. Dinosaurs in Virginia—evidence of two new genera. Lapidary Journal 36(6):1110-1111
  • R. Weems. 1979. A large parasuchian (phytosaur) from the Upper Triassic portion of the Culpeper Basin of Virginia (USA). Proceedings from the Biological Society of Washington 92(4):682-688

Category:Geologic formations of Maryland

Category:Geologic formations of Virginia

Category:Triassic System of North America

Category:Triassic geology of Virginia

Category:Norian Stage

Category:Mudstone formations

Category:Shale formations of the United States

Category:Siltstone formations of the United States

Category:Lacustrine deposits

Category:Ichnofossiliferous formations

Category:Paleontology in Virginia

{{Maryland-geologic-formation-stub}}

{{Virginia-geologic-formation-stub}}