Difference between revisions of "Basal"
(Created page with "File:Fig 80.jpg|thumb|<font size="2">'''Fig. 1.''' Stolon planes and foramenal axes in discoidal-annular and conical-uniserial shells. Schematic, not to scale. '''B:''' A c...") |
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| − | [[File:Fig | + | [[File:Fig. 80b.png|thumb|<font size="2">'''Fig. 1.''' A cone composed of a single series of discoidal chambers of which the marginal and axial areas are differentiated by colour. Note the distribution of the marginal area, the emplacement of the exoskeleton, and of the axial area housing the endoskeleton, in axial, horizontal (basal) and transverse sections. The axis of the shell is indicated by a vertical arrow. The surface of the cone is called the cone mantle, its horizontal termination is the cone base. A vertical line on the slanting surface of the cone is called a cone mantle line. The cone radius is indicated by a double arrow; (Hottinger, 2006; fig. 80b [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]] |
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==Definition== | ==Definition== | ||
