They are the result of cataclastic phenomena (crushing, attrition, smoothing, polishing..)
They have the mineralogical composition of the substrate they degrade.
They are often associated with other structures (crystallization, dissolution).
- s293
- s292
- s291
- s290
- s289
- s288
- s287
- s286
- s285
- s284
- s283
- s282
- s281
- s280
- s279
- s277
- s276
- s275
- s273
- s272
- s271
- s270
- s268
- s267
- s266
- s265
- s264
- s263
- s262
- s261
- s260
- s259
- s258
- s257
- s256
- s255
- s254 bis rot
- s254 bis rot
- s252
- s250
- s249
- s248
- s247
- s246
- s245
- s242
- s241
- s240
- s239
- s238