Echkar Formation
Geologic formation in Niger
title: "Echkar Formation" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["geologic-formations-of-niger", "lower-cretaceous-series-of-africa", "upper-cretaceous-series-of-africa", "cretaceous-niger", "albian-stage", "cenomanian-stage", "sandstone-formations", "shale-formations", "fluvial-deposits", "lacustrine-deposits", "paleontology-in-niger", "agadez-region"] description: "Geologic formation in Niger" topic_path: "philosophy" source: "https://en.wikipedia.org/wiki/Echkar_Formation" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Geologic formation in Niger ::
::data[format=table title="Infobox Rockunit"]
| Field | Value |
|---|---|
| name | Echkar Formation |
| type | Geological formation |
| age | Late Albian-Cenomanian |
| ~ | |
| period | Cenomanian |
| prilithology | Sandstone |
| otherlithology | Claystone |
| namedfor | Echkar, Aderbissinat |
| region | Agadez Region |
| country | Niger |
| coordinates | |
| paleocoordinates | |
| unitof | Tegama Group |
| underlies | Farak Formation |
| overlies | Elrhaz Formation |
| extent | Iullemmeden Basin |
| map | {{Location map+ |
| relief | 1 |
| width | 250 |
| float | center |
| lat_deg | 17.9 |
| lon_deg | 5.6 |
| mark | Green pog.svg |
| marksize | 12 |
| :: |
| name = Echkar Formation | image = | caption = | type = Geological formation | age = Late Albian-Cenomanian ~ | period = Cenomanian | prilithology = Sandstone | otherlithology = Claystone | namedfor = Echkar, Aderbissinat | namedby = | region = Agadez Region | country = Niger | coordinates = | paleocoordinates = | unitof = Tegama Group | subunits = | underlies = Farak Formation | overlies = Elrhaz Formation | thickness = | extent = Iullemmeden Basin | area = | map = {{Location map+ | Niger | relief = 1 | width = 250 | float = center | places = | lat_deg = 17.9 | lon_deg = 5.6 | mark = Green pog.svg | marksize = 12 | map_caption =
The Echkar Formation is a geological formation comprising sandstones and claystones in the Agadez Region of Niger, central Africa.
Description
Its strata date back to the Late Albian to Late Cretaceous (Cenomanian stages, about 100-95 million years ago). Dinosaur remains are among the fossils that have been recovered from the formation.
Fossil content
Vertebrates
Fish
::data[format=table]
| Fish of the Echkar Formation | Genus | Species | Material | Notes | Images |
|---|---|---|---|---|---|
| Ceratodus | C. sp. | [[File:Ceratodus.jpg | frameless | ||
| Lepidotes | L. sp. | [[File:2015 museum Le Havre Lepidotes.jpg | frameless | ||
| Onchopristis | O. numida | [[File:Onchopristis numidus 052013.JPG | frameless]] | ||
| Platyspondylus | P. foureaui | ||||
| :: |
Dinosaurs
Ornithischians
::data[format=table]
| Ornithischians of the Echkar Formation | Genus | Species | Material | Notes | Images |
|---|---|---|---|---|---|
| ?Stegosauria indet. | No genus given. May not actually belong to Stegosauria. | ||||
| :: |
Sauropods
::data[format=table]
| Sauropods of the Echkar Formation | Genus | Species | Material | Notes | Images |
|---|---|---|---|---|---|
| Aegyptosaurus | A. baharijensis | [[File:Aegyptosaurus LM.png | frameless | ||
| Rebbachisaurus | R. tamesnensis | ||||
| R. sp. | [[File:Rebbachisaurus BW.jpg | frameless]] | |||
| :: |
Theropods
::data[format=table]
| Theropods of the Echkar Formation | Genus | Species | Material | Notes | Images |
|---|---|---|---|---|---|
| Bahariasaurus | B. ingens | [[File:Bahariasaurus ingens, like megaraptora.jpg | frameless]] | ||
| Carcharodontosaurus | C. iguidensis | [[File:Carcharodontosaurus.png | center | ||
| Elaphrosaurus | E. iguidiensis (=Theropoda indet.) | Likely an indeterminate theropod. | [[File:Elaphrosaurus.jpg | frameless]] | |
| Inosaurus | I. tedreftensis | ||||
| Rugops | R. primus | [[File:Rugops (cropped).png | center | ||
| Spinosaurus | S. sp. | Teeth | [[File:Spinosaurus aegyptiacus.png | center | |
| :: |
Reptiles
::data[format=table]
| Reptiles of the Echkar Formation | Genus | Species | Material | Notes | Images |
|---|---|---|---|---|---|
| Araripesuchus | A. rattoides | [[File:Araripesuchus patagonicus SEND.jpg | center | ||
| Elosuchus | E. sp. | [[File:Elosuchus BW.jpg | frameless]] | ||
| Fortignathus | F. felixi | ||||
| Kaprosuchus | K. saharicus | [[File:Kaprosuchus NT.jpg | center | ||
| Laganosuchus | L. thaumastos | [[File:Laganosuchus thaumastos.jpg | center | ||
| Testudines indet. | No genus given. | ||||
| :: |
References
Bibliography
- {{citation |last=Young |first=Mark T. |last2=Hastings |first2=Alexander K. |last3=Allain |first3=Ronan |last4=Smith |first4=Thomas J. |year=2017 |title=Revision of the enigmatic crocodyliform Elosuchus felixi de Lapparent de Broin, 2002 from the Lower–Upper Cretaceous boundary of Niger: potential evidence for an early origin of the clade Dyrosauridae |journal=Zoological Journal of the Linnean Society |volume=179 |pages=377–403 }}
References
- Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Africa)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 571-573. {{ISBN. 0-520-24209-2.
- [https://paleobiodb.org/classic/displayCollResults?collection_no=25221 In Abangarit-Tamesna] at [[Fossilworks]].org
- Brusatte, S. and Sereno, P.C. (2005). "A new species of ''Carcharodontosaurus'' (Dinosauria: Theropoda) from the Cenomanian of Niger and its implications for allosauroid phylogeny." ''Journal of Vertebrate Paleontology'', '''25''': 40A.
- Brusatte, S.L. and Sereno, P.C. (2007). "A new species of ''Carcharodontosaurus'' (dinosauria: theropoda) from the Cenomanian of Niger and a revision of the genus." ''Journal of Vertebrate Paleontology'', '''27'''(4)
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