LESSON 11 Flashcards
Formation, on the stone surface, of cavities which may be interconnected and may have variable shapes and sizes (generally centimetric,
sometimes metric).
ALVEOLIZATION
ALVEOLIZATION sub type:
coving
erosion feature consisting in a single alveoli developing from the edge of the stone block.
coving
Loss of original surface, leading to smoothed shapes.
erosion
erosion sub types:
- differential erosion
- rounding
- roughening
Differential erosion may result in
- loss of components
- loss of matrix
occurs when erosion does not proceed at the same
rate from one area of the stone to the other.
differential erosion
Partial or selective elimination of soft (clay lenticles, nodes of limonite, etc) or compact stone
components (pebbles, fossil fragments, geological concretions, lava fragments).
loss of components
Partial or selective elimination of the stone matrix, resulting in protruding compact stone components.
loss of matrix
Preferential erosion of originally angular stone
edges leading to a distinctly rounded profile.
rounding
selective loss of small particles from an originally smooth stone surface.
roughening
loss of stone material clearly due to a mechanical
action.
mechanical damage
mechanical damage sub types:
- impact damage
- cut
- scratch
- abrasion
- keying
Mechanical damage due to the impact of a projectile (bullet, shrapnel) or of a hard tool.
impact damage
Loss of material due to the action of an edge tool. It
can have the appearance of an excavated cavity, an incision,
a missing edge
cut
