Suevites from various impact structures

Wanapitei (Canada) suevite

suevite, Wanaptei impact structure, Canada, red variety

Fig. 1. Suevite, Wanapitei (Canada) impact structure. Red variety.

suevite, Wanapitei impact structure, Canada, grayish varietyFig. 2. Suevite, Wanapitei (Canada) impact structure. Grayish variety. The Wanapitei suevites do not occur in outcrops but are found as erratic blocks only.


Scandinavian suevites

Lake Mien (Sweden) suevite

Lake Mien suevite breccia, SwedenFig. 3. Suevite, Lake Mien (Sweden) impact structure. Lake Mien suevites, like the Wanapitei suevites, are occurring in the form of glacial erratic blocks only.


Lappajärvi (Finland) suevite

suevite, Lappajärvi impact structure, FinlandFig. 4. Suevite, Lappajärvi (Finland) impact structure.


Sääksjärvi (Finland) suevite

suevite, Sääksjärvi impact structure, FinlandFig. 5. Suevite, Sääksjärvi (Finland) impact structure.


Dellen (Sweden) suevite

suevite, Dellen impact structure, Sweden

Fig. 6. Suevite, Dellen (Sweden) impact structure. Also the Dellen suevite is found as boulders only.


Siljan (Sweden) suevites

suevite breccia, Siljan ring impact structure, SwedenFig. 7. Suevite, Siljan ring impact structure, Sweden.

suevite breccia, Siljan ring impact structure, SwedenFig. 8. Suevite(?) breccia, Siljan (Sweden) impact structure. Possibly this sample is rather an impact melt rock by definition. Sample courtesy Jan-Olov Svedlund.


Kara (Russia) suevite

Fig. 9. Suevite, Kara (Russia) impact structure.


Rochechouart (France) suevites

suevite, Rochechouart impact structure, France, Chassenon varietyFig. 10. Suevite, Rochechouart (France) impact structure; Chassenon green variety. The greenish suevite is exposed in the environs of the village of Chassenon. Here, major parts of a Gallic-Roman site (Cassinomagus) have been constructed (Fig. 11) using the suevite breccias from several ancient quarries.

Gallic-Roman site, Chassenon, Rochechouartimpact structure, suevite building stoneFig. 11. The Gallic-Roman site of Cassinomagus (some 25 years ago).

suevite, Rochechouart impact structure, France, Montoume red varietyFig. 12. Suevite, Rochechouart (France) impact structure; Montoume red variety.

suevite, Rochechouart impact structure, France, Montoume red varietyFig. 13. Suevite, Rochechouart (France) impact structure; Montoume red variety.

suevite disused quarry, Montoume, Rochechouart impact structure, FranceFig. 14. The disused Montoume suevite quarry some 25 years ago.


Ries crater (Germany) suevites

suevite, Ries impact structure, Germany, Aumühle quarryFig. 15. Suevite, Ries (Germany) impact structure. Aumühle quarry.

suevite quarry, Aumühle, Ries crater, GermanyFig. 16. Massive suevite in the Aumühle quarry, Ries (Germany) impact structure. The Aumühle suevite is exploited for the making of a special cement. In ancient centuries, the Ries suevite was a highly esteemed building stone which over time has strongly suffered from weathering, however.

suevite from disused quarry, Otting, Ries impact structure, GermanyFig. 17. Suevite, Ries (Germany) impact structure; from disused Otting quarry. Note the dark melt clasts and the light, strongly shocked clast from the crystalline basement.

sediment-rich suevite from the Zipplingen outcrop, Ries crater, GermanyFig. 18. Suevite, Ries (Germany) impact structure; Zipplingen variety. Due to the mixed, sedimentary/crystalline target of the Ries crater, the suevites in part show notably varying composition. The Zipplingen suevite shown here is especially rich in sedimentary clasts.

suevite cut showing impact melt rock inclusions

Fig. 18-1. Suevite, Ries crater; cut face exhibiting black melt glass inclusions (“glass bombs”). The whitish particle in the right-hand specimen glass bomb is a gneiss fragment.

Unknown impact (Canada), erratic suevite boulder

suevite from a boulder found east of Sudbury, CanadaFig. 19. Suevite slice cut from a boulder that was found in Canada roughly 250 km east of the Sudbury impact structure. Making a relation to a specific impact structure remains to be done. Photomicrographs of the shocked rock (with indication of a mixed, sedimentary/crystalline, target) are shown in Figs. 20 – 22. Sample courtesy Robert Szep.

glass particle in suevite sample, east of the Sudbury impact structureFig. 20. Suevite from Fig. 19; glass particle; plane light.

planar deformation features, PDFs, in quartz, suevite breccia boulder, east of Sudbury

Fig. 21. Suevite from Fig. 19; quartz grain displaying three sets of decorated planar deformation features (PDFs); xx polarizers.

diaplectic quartz crystal, suevite boulder, east of Sudbury, CanadaFig. 22. Suevite from Fig. 18; diaplectic quartz crystal, xx polarizers. Field width in Figs. 20- 22 c. 100 µm.