Editing Caldera (section)

====Valles====
[[File:Valle Caldera, New Mexico.jpg|thumb|Valle Caldera, New Mexico]]
{{Main|Valles Caldera}}
For their 1968 paper<ref name="smith-bailey-1968"/> that first introduced the concept of a resurgent caldera to geology,<ref name="cole-etal-2005"/> R.L. Smith and R.A. Bailey chose the Valles caldera as their model. Although the Valles caldera is not unusually large, it is relatively young (1.25 million years old) and unusually well preserved,<ref>{{cite journal |last1=Goff |first1=Fraser |last2=Gardner |first2=Jamie N. |last3=Reneau |first3=Steven L. |last4=Kelley |first4=Shari A. |last5=Kempter |first5=Kirt A. |last6=Lawrence |first6=John R. |title=Geologic map of the Valles caldera, Jemez Mountains, New Mexico |journal=New Mexico Bureau of Geology and Mineral Resources Map Series |date=2011 |volume=79 |bibcode=2011AGUFM.V13C2606G |url=https://geoinfo.nmt.edu/publications/maps/geologic/gm/79/  |access-date=18 May 2020}}</ref> and it remains one of the best studied examples of a resurgent caldera.<ref name="cole-etal-2005"/> The ash flow tuffs of the Valles caldera, such as the [[Bandelier Tuff]], were among the first to be thoroughly characterized.<ref>{{cite journal |last1=Ross |first1=Clarence S. |last2=Smith |first2=Robert L. |title=Ash-flow tuffs: Their origin, geologic relations, and identification |journal=U.S. Geological Survey Professional Paper |series=Professional Paper |date=1961 |volume=366 |page=7 |doi=10.3133/pp366|doi-access=free |bibcode=1961usgs.rept....7R |hdl=2027/ucbk.ark:/28722/h26b1t |hdl-access=free }}</ref>