Limestone concretion from the Bunte breccia ejecta displaying peculiar rotated fractures. Note that the cobble is not broken into pieces. More about impact-induced rotated fractures on http://www.impact-structures.com/spain/minguez/mesoscopic.htm , and in the article Ernstson, K. & Claudin, F.: Pelarda Formation (Eastern Iberian Chains, NE Spain): Ejecta of the Azuara impact structure. - N.Jb.Geol.Paläont.Mh., 1990, 581-599, 1990.

So-called Ries belemnites from the Bunte breccia ejecta; Ronheim quarry. Because the rostra were embedded in soft Jurassic claystone, the shearing proves sudden high-pressure/short-term deformation. It is uncertain at which time of the cratering process the rostra experienced the typical deformation: in the early compression stage, during the excavation, or upon emplacement of the ejecta. - The field is 4.5 cm wide.

Megascopic analogue to the Ries belemnites? The Malmian limestone block with prominent closely spaced subparallel displacements has been removed from the Bunte breccia ejecta (Ronheim quarry) where it was embedded in soft claystones. Like the belemnites, the block doesn't tell us when it experienced the peculiar deformation which is clearly not of pre-impact tectonic origin.

On the other hand, quite the same type of deformation is frequently observed in the ejecta of the Azuara - Rubielos de la Cérida doublet impact structure in Spain. There, also limestone clasts display subparallel fracturing and displacements without, however, being broken into pieces. Again, the clasts are embedded in soft ejecta material. These "bread cut to slices" features are described on http://www.impact-structures.com/spain/minguez/mesoscopic.htm .

"Pook's pebble" from the Ries crater Bunte breccia ejecta (Gundelsheim quarry). In the Belize ejecta from the Chicxulub impact structure, the Pook's pebbles layer is characterized by limestone clasts displaying prominent penetration features, striations and polish (see, e.g., the paper by Ocampo et al: http://www.lpi.usra.edu/meetings/lpsc97/pdf/1861.PDF ). This limestone clast from the Ries ejecta also shows a prominent penetration mark caused by plastic deformation. With the help of a magnifying glass, striations and polish can also be observed.

The same type of deformation is abundant in the ejecta (Pelarda Fm., Puerto Mínguez ejecta) of the Azuara - Rubielos de la Cérida doublet impact structure in Spain (see http://www.impact-structures.com/spain/minguez/mesoscopic.htm ).

Well-rounded, striated clast of Malmian limestone (not a concretion!) in Liassic claystones of the Ries Bunte breccia ejecta (Ronheim quarry). Sub- to well-rounded clasts are a well-known signature in impact breccias. In the Spanish Azuara - Rubielos de la Cérida doublet impact structure, an impact conglomeratization (our definition) can be observed that is characterized by an in situ formation of well-rounded clasts from massive limestone beds. It is suggested that well-rounded limestone clasts in the Bunte breccia underwent a similar conglomeratization process upon impact deformation. It is further suggested that the well-known striated Buchberg pebbles found in the Bunte breccia ejecta have a similar origin - different from the current opinion that they are related with pre-Ries Tertiary conglomerates.

Shatter cones

Shatter cones in hornblende kersantite. From disused Wengenhausen quarry. More about shattercone formation, more shattercones from the Ries crater and from other impact structures on http://www.impact-structures.com/shattercone/the_shatter_cone_page.htm .