Mugher Mudstone

Mugher Mudstone
Stratigraphic range: Tithonian
Type Geological formation
Underlies Debre Libanos Sandstone, Tertiary basalts
Overlies Lagajima Limestone
Thickness 320 m (1,050 ft)
Lithology
Primary Mudstone, sandstone
Other Gypsum, dolomite, shale (base)
Location
Coordinates 9°30′N 38°36′E / 9.5°N 38.6°E / 9.5; 38.6Coordinates: 9°30′N 38°36′E / 9.5°N 38.6°E / 9.5; 38.6
Approximate paleocoordinates 12°18′S 24°48′E / 12.3°S 24.8°E / -12.3; 24.8
Region Shewa
Country  Ethiopia
Extent Ethiopian Highlands

The Mugher Mudstone is a Tithonian geologic formation located in Ethiopia. It dates to the Tithonian stage of the Late Jurassic time period. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.[1] The lithology consists of gypsum, dolomite and shale alternations at the base, overlain by mudstone intercalated with fine to medium grained sandstone.[2]

An unnamed dromaeosaurine dromaeosaurid has been recovered from this formation. The discoverers proved it to be a dromaeosaurine, and not a velociraptorine, based on its low DSDI ratio.[3] Many other remains have been uncovered also, including indeterminate ornithopods and allosauroids.[4]

See also

References

  1. ↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  2. ↑ Assefa, Getaneh (1991-08-10). "Lithostratigraphy and environment of deposition of the Late Jurassic - Early Cretaceous sequence of the central part of Northwestern Plateau, Ethiopia". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen. 182 (3): 255–284. doi:10.1127/njgpa/182/1991/255. ISSN 0077-7749.
  3. ↑ Mortimer, Mickey. "List of Dromaeosaurids". Archived from the original on July 28, 2014. Retrieved March 27, 2014.
  4. ↑ Goodwin, Mark B.; Clemens, William A.; Hutchison, J. Howard; Wood, Craig B.; Zavada, Michael S.; Kemp, Anne; Duffin, Christopher J.; Schaff, Charles R. (1999-12-13). "Mesozoic continental vertebrates with associated palynostratigraphic dates from the northwestern Ethiopian plateau". Journal of Vertebrate Paleontology. 19 (4): 728–741. doi:10.1080/02724634.1999.10011185. ISSN 0272-4634.

Bibliography

  • Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp.  ISBN 0-520-24209-2.
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