Articles and Contributions
The mid-Tertiary Azuara and Rubielos de la Cérida paired impact structures (Spain) by K. Ernstson, F. Claudín, U. Schüssler and K.Hradil
The comprehensive paper on the Spanish Azuara and Rubielos de la Cérida impact structures published in 2002 may now be downloaded here as a PDF file, and the Abstract may be clicked here. A relatively fast download has been chosen at the expense of print quality noticeable especially with the photographs. A few Reprints of the paper are still available on request.
After the print of the paper, further geological and petrographical work has shown the Rubielos de la Cérida structure enlarges to the south to form a roughly 80 km long impact basin. A paper on this topic that has been published by the Meteorite magazine my be clicked here
The Sudbury Anthraxolite Report, by Robert A. Szep
The origin of carbonaceous matter in the form of finely disseminated particles and in the form of anthraxolite dikes in the Sudbury impact structure has been debated for some time past. Endogenetic processes as well as the formation in the impact cratering process or the impactor to be the source have been suggested, and carbonaceous material in meteorites and fullerenes in Sudbury rocks have stimulated the discussion.
We also mention the occurrence of peculiar carbonaceous material in the mid-Tertiary Azuara - Rubielos de la Cérida multiple impact event (see the article by Ernstson et al.: Unusual melt rocks from meteorite impact [http://www.impact-structures.com/article/article_4.html]), in the strewn field of the Holocene Chiemgau impact event (Rösler, W., Hoffmann, V., Raeymaekers, B., Schryvers, D., Popp, J. (2005): Diamonds in carbon spherules - evidence for a cosmic impact?. Meteoritics and Planetary Science, 40, p. A129; also see: The Holocene Tüttensee meteorite impact crater in southeast Germany http://www.chiemgau-impact.com/artikel2.pdf), and in the heavily controversial 13,000 years BP comet impact, see http://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=109768.
Robert A. Szep is well known among meteorite and impact researchers and collectors as an impact-experienced field collector of impactites. He created, produced and authored The Third Millennium Meteorite Calendars, published in 2000 and 2003 and has written articles such as "The Sudbury Star Wound" and "When Big Things Strike Earth - on the topics of meteorites and impact structures".
Additionally, “Zep” has been interviewed on local and nation-wide TV and featured & quoted in local & national newspaper articles, also on the subjects of meteorites and craters, on a number of occasions over the past decade, all in order to increase interest & awareness of these things among the general public. His first-hand report, based primarily on field observations and subsequent study and testing of sampled material, is written in a manner that makes what the average person might consider a mundane topic, interesting.
As a regular visitor to this website, Robert asked us if we would be interested in placing his Anthraxolite Report on our website, and, of course, we are fond to do so, and we also mention his disposition to provide researchers and collectors with this peculiar material.
Readers being interested in the Sudbury carbonaceous material are referred also to an abstract article: RAMAN STUDY OF CARBONACEOUS MATTER AND ANTHRAXOLITE IN ROCKS FROM THE SUDBURY, ONTARIO, IMPACT STRUCTURE by Dieter Heymann and Burkhard Dressler, see http://www.lpi.usra.edu/meetings/lpsc97/pdf/1268.PDF.
To read The Report in its entirety, click HERE
The Holocene Tüttensee meteorite impact crater in southeast Germany
The Azuara impact event in the Spanish TV
A field trip to the Azuara and Rubielos de la Cérida impact structures (in Spanish)
Unusual melt rocks from meteorite impact
An Impact Crater Chain in Northern Spain - the full METEORITE magazine article
Are bent planar deformation features (PDFs) no PDFs?
The Sirente craters (Italy): On the possible origin of geomagnetic anomalies (Ormö et al. 2007)