Editing Chicxulub crater (section)

===Geophysical data===
Two [[reflection seismology|seismic reflection]] datasets have been acquired over the offshore parts of the crater since its discovery. Older [[reflection seismology#2D versus 3D|2D seismic datasets]] have also been used that were originally acquired for hydrocarbon exploration. A set of three long-record 2D lines was acquired in October 1996, with a total length of {{convert|650|km|sp=us}}, by the [[BIRPS]] group. The longest of the lines, ''Chicx-A'', was shot parallel to the coast, while ''Chicx-B'' and ''Chicx-C'' were shot NW–SE and SSW–NNE respectively. In addition to the conventional seismic reflection imaging, data was recorded onshore to allow for [[Seismic wide-angle reflection and refraction|wide-angle refraction imaging]].<ref>{{Cite journal |last1=Morgan|first1= J.|author1-link= Joanna Morgan |last2=Warner|first2= M. |last3=Brittan|first3= J. |last4=Buffler|first4= R. |last5=Camargo|first5= A. |last6=Christeson|first6= G. |last7=Denton|first7= P. |last8=Hildebrand|first8= A. |last9=Hobbs|first9= R. |last10=Macintyre|first10= H.|last11= Mackenzie|first11= G.|last12= Maguire|first12= P.|last13= Marin|first13= L.|last14= Nakamura|first14= Y.|last15= Pilkington|first15= M.|last16=Sharpton|first16= V.|last17= Snyder|first17= D.|last18=Suarez|first18= G.|last19=Trejo|first19= A. |display-authors=3  |year=1997 |title=Size and morphology of the Chicxulub impact crater |url=https://www.researchgate.net/publication/232763118 |journal=Nature |volume=390 |issue=6659 |pages=472–476 |doi=10.1038/37291|bibcode=1997Natur.390..472M |s2cid=4398542 }}</ref><ref name="Snyder&Hobbs_1999">{{Cite book |title=Large Meteorite Impacts and Planetary Evolution II |last1=Snyder, D.B. |last2=Hobbs, R.W. |publisher=Geological Society of America |year=1999 |isbn=978-0-8137-2339-6 |editor-last=Dressler, B.O. |series=Special Publication |volume=339 |chapter=Deep seismic reflection profiles across the Chicxulub crater |editor-last2=Sharpton, V.L. |chapter-url=https://books.google.com/books?id=gV_H9cK94q8C&q=Chix&pg=PA263}}</ref>

In 2005, another set of profiles was acquired, bringing the total length of the 2D deep-penetration seismic data up to {{convert|2,470|km|sp=us}}. This survey also used [[ocean bottom seismometer]]s and land stations to allow [[seismic tomography|3D travel time inversion]] to improve the understanding of the velocity structure of the crater. The data was concentrated around the interpreted offshore peak ring to help identify possible drilling locations. At the same time, gravity data was acquired along {{convert|7638|km|sp=us}} of profiles. The acquisition was funded by the [[National Science Foundation]] (NSF), [[Natural Environment Research Council]] (NERC) with logistical assistance from the [[National Autonomous University of Mexico]] (UNAM) and the Centro de Investigación Científica de Yucatán (CICY – Yucatán Center for Scientific Investigation).<ref name="Gulick_etal_2013"/><ref name="Morgan_etal_2005">{{Cite journal |last1=Morgan |first1=J.|author1-link= Joanna Morgan |last2=Urrutia-Fucugauchi |first2=J. |last3=Gulick |first3=S. |last4=Christeson |first4=G. |last5=Barton |first5=P. |last6=Rebolledo-Vieyra |first6=M. |last7=Melosh |first7=J. |display-authors=3|year=2005 |title=Chicxulub Crater Seismic Survey prepares way for future drilling |journal=Eos |volume=86 |issue=36 |pages=325–328 |doi=10.1029/2005EO360001|bibcode=2005EOSTr..86..325M |doi-access=free }}</ref>