View source for Earth:San Lorenzo Formation, Bolivia

{{Infobox rockunit
| name           = San Lorenzo Formation
| image          =
| caption        =
| type           = [[Earth:Geological formation|Geological formation]]
| period         = Dapingian
| age            = [[Earth:Dapingian|Dapingian]]<br />~{{fossil range|478|466}}
| prilithology   = [[Chemistry:Shale|Shale]], [[Earth:Sandstone|sandstone]]
| otherlithology = [[Earth:Quartzite|Quartzite]]
| namedfor       = San Lorenzo
| namedby        =
| region         = Tarija Department
| country        = {{BOL}}
| coordinates    = {{coord|21.0|S|65.0|W|display=inline,title}}
| paleocoordinates = {{coord|45.3|S|129.1|W|display=inline}}
| unitof         = 
| subunits       =
| underlies      =
| overlies       =
| thickness      = 
| extent         = 
| area           =
| map            = {{Location map+ | Bolivia
| relief = 1
| width   = 250
| float   = center
| places  =
  {{Location map~ | Bolivia
  | lat_deg = -21.0
  | lon_deg = -65.0
  | mark = Dark Green 004040 pog.svg
  | marksize = 10
  }}
}}
| map_caption    =
}}
The '''San Lorenzo Formation''' is a [[Earth:Dapingian|Dapingian]] geologic formation of southern Bolivia. The dark gray, greenish, and black [[Chemistry:Shale|shale]] with thin intercalations of white-yellow [[Earth:Quartzite|quartzite]]s were deposited in an open marine submarine fan [[Earth:Depositional environment|environment]].<ref>[http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=8843 Camargo Syncline] at [[Biology:Fossilworks|Fossilworks]].org</ref><ref>[http://www.fossilworks.org/cgi-bin/bridge.pl?a=collectionSearch&collection_no=197270 Camargo Syncline 2] at [[Biology:Fossilworks|Fossilworks]].org</ref>

== Fossil content ==
The formation has provided the following fossils:
{{div col|colwidth=20em}}
* ''[[Biology:Didymograptus|Didymograptus nitidus]]''
* ''Dinorthis obispoensis''
* ''Orthambonites calligramma''
* ''Peelerophon oehlerti''
* ''[[Biology:Tetragraptus|Tetragraptus quadribrachiatus]]''
* ''[[Biology:Thysanopyge|Thysanopyge argentina]]''
* ''Yutagraptus vdeflexus''
* ''[[Biology:Phyllograptus|Phyllograptus cf. typus]]''
* ''[[Biology:Dictyonema (graptolite)|Dictyonema sp.]]''
* ''[[Biology:Endoceras|Endoceras sp.]]''
* ''Lecanospira sp.''
* ''[[Biology:Megalaspidella|Megalaspidella sp.]]''
* ''Pachendoceras sp.''
{{div col end}}

== See also ==
* [[Earth:List of fossiliferous stratigraphic units in Bolivia|List of fossiliferous stratigraphic units in Bolivia]]

== References ==
{{reflist|30em}}

== Further reading ==
* R. Suárez Soruco. 1976. El sistema ordovícico en Bolivia. Revista Tecnica YPF Bolivia 5(2):111-123

[[Category:Geologic formations of Bolivia]]
[[Category:Shale formations]]
[[Category:Sandstone formations]]

{{Sourceattribution|San Lorenzo Formation, Bolivia}}