Suevite (or suevite breccia)
A suevite breccia is a polymictic impact breccia with clastic matrix that contains shocked and unshocked clasts and cogenetic melt particles (glassy or crystallized).
Fig. 1. Suevite breccia, Rochechouart (France) impact structure. Red Montoume variety.
Fig. 2. Suevite breccia, Azuara (Spain) impact structure; Cucalón deposit.
Fig. 3. Suevite breccia, Paasselkä (Finland) impact structure.
A comprehensive discussion of suevite breccias including many images is found on the special suevite page: http://www.impact-structures.com/suevite/the_suevite_page.htm
Not an impact breccia: impact melt rock
Fig. 4. Impact melt rock (granophyre), Vredefort impact structure (South Africa).
Although macroscopically very similar to polymictic impact breccias, the term "impact melt breccia" should be avoided. Different from a breccia which by definition has a clastic matrix, an impact melt rock has a matrix solidified from a melt (glassy or crystallized). Also see: