# Springdale Caldera

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The **Springdale Caldera** is a large [Early Silurian](/source/Early_Silurian) [caldera](/source/Caldera) in west-central [Newfoundland](/source/Newfoundland_(island)), [Canada](/source/Canada). It is at least 60 km (37 mi) long and 35 km (22 mi) wide, covering an area of more than 2,000 km2 (770 sq mi). It is one of the few calderas in Newfoundland that form a large Silurian age [volcanic field](/source/Volcanic_field). [Basalt](/source/Basalt), [andesite](/source/Andesite), [rhyolite](/source/Rhyolite), [pyroclastic rocks](/source/Pyroclastic_rock), [debris flows](/source/Debris_flow), [breccias](/source/Breccia) and red [sandstone](/source/Sandstone) are present at the Springdale Caldera.[1]

## See also

- [Volcanism of Canada](/source/Volcanism_of_Canada)
- [Volcanism of Eastern Canada](/source/Volcanism_of_Eastern_Canada)
- [List of volcanoes in Canada](/source/List_of_volcanoes_in_Canada)

## References

1. [Geology of the Springdale Group: a newly recognized Silurian epicontinental-type caldera in Newfoundland](https://www.nrcresearchpress.com/doi/pdfplus/10.1139/e87-110)

## External links

- [The Springdale Caldera: A Field Guide for the Annual Field Meeting of the Geological Association of Canada, Newfoundland Branch](http://gac.esd.mun.ca/nl/pdf/Field%20Guide%201986.pdf)
- [Discordant Silurian paleolatitudes for central Newfoundland: New paleomagnetic evidence from the Springdale Group](http://www.globalchange.umich.edu/Ben/Publications/93_epsl_potts.pdf)
- [Sulurian Orogeny in the Newfoundland Appalachians](https://www.jstor.org/pss/30081102?searchUrl=%2Faction%2FdoBasicSearch%3FQuery%3DGeology%2Bof%2Bthe%2BSpringdale%2BGroup%253A%2Ba%2Bnewly%2Brecognized%2BSilurian%2Bepicontinental-type%2Bcaldera%2Bin%2BNewfoundland%26wc%3Don%26acc%3Doff)
- [Discordant Sulrian Paleolatitudes](http://www.globalchange.umich.edu/Ben/Publications/93_epsl_potts.pdf)
- [Geology, geochemistry and geochronology of the Springdale Group, an early Silurian Caldera in central Newfoundland](https://research.library.mun.ca/6799/)

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Adapted from the Wikipedia article [Springdale Caldera](https://en.wikipedia.org/wiki/Springdale_Caldera) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Springdale_Caldera?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.