View source for Earth:Penglaizhen Formation

{{Short description|Geological formation in Sichuan, China}}
{{Infobox rockunit
| name           = Penglaizhen Formation
| image          = 
| caption        = 
| type           = [[Earth:Geological formation|Geological formation]]
| age            = {{fossilrange|Berriasian|Valanginian}}
| period         = Early Cretaceous
| prilithology   = 
| otherlithology = 
| namedfor       = 
| namedby        = 
| region         = [[Earth:Asia|Asia]]
| country        = {{Flag|China}}
| coordinates    = 
| unitof         = 
| subunits       = 
| underlies      = Cangxi & [[Earth:Jiaguan Formation|Jiaguan Formation]]s
| overlies       = [[Earth:Suining Formation|Suining Formation]]
| thickness      = 
| extent         = Sichuan Basin
| area           = 
| map            = 
| map_caption    = 
}}

The '''Penglaizhen Formation''' ({{zh|s=蓬莱镇组|t=蓬萊鎮組|p=Péngláizhèn Zǔ}}), is a geological formation in Sichuan, China. It was formerly thought to be Late Jurassic in age. However, the underlying [[Earth:Suining Formation|Suining Formation]] has been dated to the Mid Cretaceous, so the formation must be this age or later<ref>{{Cite journal|url=http://engine.scichina.com/publisher/scp/journal/SCES/62/1/10.1007/s11430-017-9268-7?slug=fulltext|doi = 10.1007/s11430-017-9268-7|title = Jurassic integrative stratigraphy and timescale of China|year = 2019|last1 = Huang|first1 = Diying|journal = Science China Earth Sciences|volume = 62|issue = 1|pages = 223–255|bibcode = 2019ScChD..62..223H|s2cid = 134359019}}</ref> However a subsequent study suggested that the dates for the formation had been altered by geologic processes, and there dating the Suining Formation to the around the Jurassic Cretaceous boundary about 145 Ma, which means that Penglaizhen Formation is likely Early Cretaceous in age.<ref>{{Cite journal|last=Huang|first=Diying|date=19 October 2018|title=Jurassic integrative stratigraphy and timescale of China|url=http://link.springer.com/10.1007/s11430-017-9268-7|journal=Science China Earth Sciences|language=en|volume=62|issue=1|pages=223–255|doi=10.1007/s11430-017-9268-7|bibcode=2019ScChD..62..223H |s2cid=134359019|issn=1674-7313}}</ref> Dinosaur remains are among the fossils that have been recovered from the formation.<ref name="latejurassicdistribution">Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Jurassic, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 550–552. {{ISBN|0-520-24209-2}}.</ref>

== Vertebrate paleofauna ==
Indeterminate ornithischian tracks have been recovered from Penglaizhen outcrops in Sichuan, China.<ref name="latejurassicdistribution" />

{| class="wikitable" align="center"
|- 
! Genus !! Species !! Presence !! Notes !! Images
|-
| ''[[Biology:Mamenchisaurus|Mamenchisaurus]]''<ref name="latejurassicdistribution" />
| ''M. anyuensis''<ref name="latejurassicdistribution" />
| Sichuan<ref name="latejurassicdistribution" />
| 
|  
|-
|?''[[Biology:Yangchuanosaurus|Yangchuanosaurus]]''<ref name=":0">{{Cite journal |last1=Li |last2=Zhang |last3=Cai |date=1999 |title=The Characteristics of the Composition of the Trace Elements in Jurassic Dinosaur Bones and Red Beds in Sichuan Basin |journal=Geological Publishing House, Beijing |pages=155}}</ref>
|?''Y''. "longqiaoensis"<ref name=":0" />
|Sichuan<ref name=":0" />
|''[[Biology:Nomen nudum|Nomen nudum]]''
|
|-
|}

== Plants ==
{| class="wikitable" align="center"
|- 
! Genus !! Species !! Presence !! Notes !! Images
|-
| ''Xenoxylon''<ref>{{Cite journal |last=Xie |first=Aowei |last2=Wang |first2=Yongdong |last3=Tian |first3=Ning |last4=Xie |first4=Xiaoping |last5=Xi |first5=Shuna |last6=Uhl |first6=Dieter |date=2023-09-20 |title=New occurrence of the Late Jurassic Xenoxylon wood in the Sichuan Basin, southern China: wood anatomy, and paleobiodiversity implications |url=https://doi.org/10.1007/s12542-023-00671-9 |journal=PalZ |language=en |doi=10.1007/s12542-023-00671-9 |issn=1867-6812}}</ref>
| ''X. shehongense''
| Sichuan
| Fossil wood
|  
|-
|}

== See also ==
* List of dinosaur-bearing rock formations

== References ==
{{Reflist}}

{{coord missing|Sichuan}}

[[Category:Ichnofossiliferous formations]]



{{Sourceattribution|Penglaizhen Formation}}