Vargeão Dome

 Crater Name  Location  Latitude  Longitude  Diameter (km)  Age (Ma)  Exposed  Drilled  Target Rock**  Bolide Type***
 Vargeão Dome  Brazil  S 26° 50'  W 52° 07'  12  123 ± 1.4  Y  N  M  -

1. Perspective SRTM topo image with shaded relief (courtesy of Alvaro P. Crósta)

2. Landsat-7/ETM+ composite of bands 4, 5 and 3, enhanced with the pancromatic band (15 m) resolution (courtesy of Alvaro P. Crósta)

3. Landsat-TM 453 RGB (courtesy of Alvaro P. Crósta and Dr. João Françolin)

4. MSS Image

5. DEM image Provided by Dr. Carlos Roberto de Souza Filho

6 & 7. Image Provided by Dr. Carlos Roberto de Souza Filho


Bland, P. A., Artemieva, N. A. , de Souza Filho, C.R., The Production Rate of Small Craters on Earth, and the Expected Crater Population in South America. 67th Annual Meteoritical Society Meeting. 2004.
Crosta, A. P., Impact Craters in Brazil: How Far We've Got. 2004.
Crosta, A. P., Impact Structures in Brazil. Pohl, J., ed., Research in Terrestrial Impact Structures, Friedrich, Vieweg and Sohn, Braunschweig/Wiesbaden, pp. 30-38. 1987.
Crosta, A. P., Kazzuo-Vieira, C., Choudhuri, A. and Schrank,A., Vargeão Dome astrobleme, SC - A meteoritic impact record on volcanic rocks of the Paraná Basin. In: Winge, M., Schobbenhaus, C., Bert-Born, M. Quieroz, E.T. and Campos, D.A. (Editors), Sítios Geológicos e Paleontológicos do Brasil, v.114. 2005.
de Souza Filho, C.R., Bland, P. A., Proven, Probably and Possible Impact Craters in South America Revealed by Aster and SRTM Data and Image Processing Techniques. 67th Annual Meteoritical Society Meeting. 2004.
Hachiro, J., Four Impact cratering on the Parana Sedimentary Basin (South America), 31st International Geological Congress Abstract #G2505011.
Kazzuo-Vieira, C., Crosta, A. P. , Choudhuri, A., Impact Features from Vargeao Dome, Southern Brazil. 67th Annual Meteoritical Society Meeting. 2004.
Nédélec, A., Paquette, J-L, Yokoyama, E., Trinidade, R.I.F., Aigouy, T. and Baratoux, D, In situ U/Pb dating of impat-produced zircons from the Vargeão Dome (Southern Brazil), Meteoritics & Planetary Science, v.48, no.3, pp. 420-431. 2013.
Poulos, C. M., MacDonald, W. D. , Francolin, J., Impact Shock Features of the Vargeao Dome, Brazil. 67th Annual Meteoritical Society Meeting. 2004.
Romano, R., Crosta, A. P., Brazilian Impact craters: A review, Lunar and Planetary Science XXXV. 2004.
* pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.

** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.

***From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files. (IAB, IIIAB, IIIB, IIID - Iron Meteorite)