Pastos Bons Formation
{{Infobox rockunit
| name = Pastos Bons Formation
| image = Geologic map of the Parnaíba Basin.jpg
| caption = Geologic map of the Parnaíba Basin with the Jurassic in red
| type = Geological formation
| age = Oxfordian-Kimmeridgian
~{{fossil range|161|151}}
| period = Kimmeridgian
| prilithology = Sandstone
| otherlithology = Shale
| namedfor = Pastos Bons
| namedby =
| region = Maranhão
| country = {{BRA}}
| coordinates = {{coord|6.1|S|44.7|W|display=inline,title}}
| paleocoordinates = {{coord|2.4|S|12.1|W|display=inline}}
| unitof =
| subunits =
| underlies = Mosquitos Formation
| overlies = Sardinha Formation
| thickness =
| extent = Parnaíba Basin
| area =
| map = {{Location map+ | Brazil
| relief = 1
| width = 250
| float = center
| places =
{{Location map~ | Brazil
| lat_deg = -6.1
| lon_deg = -44.7
| mark = Cyan pog.svg
| marksize = 10
}}
{{Location map~ | Brazil
| lat_deg = -6.7
| lon_deg = -44.0
| mark = Cyan pog.svg
| marksize = 10
}}
}}
| map_caption =
}}
The Pastos Bons Formation is a Late Jurassic (Oxfordian to Kimmeridgian) geologic formation of the Parnaíba Basin in Maranhão, northeastern Brazil. The formation forms part of the sag phase of the basin. It overlies the Sardinha Formation and is overlain by the Mosquito Formation.De Castro et al., 2016, p.532 The fluvial to lacustrine sandstones and shales have provided fossils of a coelacanth fish, Parnaibaia maranhaoensis and a paralligatorid named after the formation, Batrachomimus pastosbonensis.
Fossil content
The following fossils were reported from the formation:[https://paleobiodb.org/classic/displayStrata?geological_group=&formation=Pastos%20Bons&group_formation_member=Pastos%20Bons Pastos Bons Formation] at Fossilworks.org
{{paleobiota-key-compact}}
= Crocodylomorphs =
| class="wikitable" align="center" |
| colspan="7" align="center" | Crocodylomorphs of the Pasto Bons Formation |
|---|
| Genus
! Species ! Location ! Stratigraphic position ! Material ! Notes ! Images |
| Batrachomimus{{cite journal |author1=Felipe C. Montefeltro |author2=Hans C. E. Larsson |author3=Marco A. G. de França |author4=Max C. Langer |year=2013 |title=A new neosuchian with Asian affinities from the Jurassic of northeastern Brazil |journal=Naturwissenschaften |volume=100 |issue=9 |pages=835–841 |doi=10.1007/s00114-013-1083-9 |pmid=23893176|bibcode=2013NW....100..835M |s2cid=11705304 }}
| B. pastosbonensis | | | | A paralligatorid neosuchian. | |
= Fish =
= Plants =
| class="wikitable" align="center" |
| colspan="7" align="center" | Plants of the Pasto Bons Formation |
|---|
| Genus
! Species ! Location ! Stratigraphic position ! Material ! Notes ! Images |
| Araucariaceae Indet.
| Indeterminate | | | | |
See also
- Takutu Formation, contemporaneous formation of northern Brazil and Guyana
References
{{reflist|2}}
= Bibliography =
- {{citation |first1=David Lopes |last1=De Castro |first2=Francisco Hilário |last2=Bezerra |first3=Reinhardt Adolfo |last3=Fuck |first4=Roberta Mary |last4=Vidotti |year=2016 |title=Geophysical evidence of pre-sag rifting and post-rifting fault reactivation in the Parnaíba basin, Brazil |url=https://se.copernicus.org/articles/7/529/2016/ |journal=Solid Earth |volume=7 |issue=2 |pages=529–548 |doi=10.5194/se-7-529-2016 |doi-access=free |bibcode=2016SolE....7..529L |accessdate=2020-07-07}}
- {{citation |first1=F.C. |last1=Montefeltro |first2=H. C. E. |last2=Larsson |first3=M. A. G. |last3=França |first4=M. C. |last4=Langer |year=2013 |title=A new neosuchian with Asian affinities from the Jurassic of northeastern Brazil |url=https://www.researchgate.net/publication/253335406 |journal=Naturwissenschaften |volume=100 |issue=9 |pages=835–841 |doi=10.1007/s00114-013-1083-9 |pmid=23893176 |bibcode=2013NW....100..835M |accessdate=2020-07-07}}
- {{citation |first=Y |last=Yabumoto |year=2007 |title=A New Mesozoic coelacanth from Brazil (Sarcopterygii, Actinistia) |journal=Paleontological Research |volume=12 |issue=4 |pages=329–343|doi=10.2517/prpsj.12.329 }}
Category:Geologic formations of Brazil
Category:Jurassic System of South America