Descripteur : Direction of carcass canals tubes zone A (IW)
Type du descripteur : categorical
NB: Convention: Tube begins on intervallum side.
Zone A: Intervallum side.
Canal: Pore modified by skeletal structure thikening or by lintels streching. Canal length is greater than perforation diameter.
Lintel: Skeletal structure separating and bounding adjacent pores/canals.
Carcass: Part of wall on intervallum side.
IW: Inner wall.
- Downwardly opening
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Downwardly opening: Opening on intervallum side is higher than the other one.
Downwardly projecting
- Horizontal opening
-
- Horizontal to upwardly opening
-
Upwardly opening: Opening on intervallum side is lower down than the other one.
Upwardly projecting
- Horizontal to upwardly opening AND lateral opening
-
Lateral
- Downwardly opening AND lateral opening
-
Hiérarchie
Type of carcass perforations: inner wall (IW) | |_ Direction of carcass canals tubes zone A (IW)