In each formation, the ignimbrite veneers locally grade laterally into more restricted valley-fills (predominantly of pumiceous massive lapilli-tuff facies) within small palaeo-wadis.
They cross laterally relative to the direction of the coiled coil to interact with the adjacent helix, and also form contacts with one another.
From the two basal bodies, two flagellar processes emerge laterally from the zone of differentiation.
Some of these beds are laterally traceable for up to 27 km, providing the foundations for a high-resolution event-stratigraphic framework.
Only one of the socalled 'cement-like' bands is laterally extensive, and other 'cement-like' bands are localized due to groundwater cementation.
The most complete specimens show straight, apparently rigid stems, with small leaves attached laterally in two rows along the stem.
It consists of microcrystalline calcite, locally silicified to chalcedony, which occurs as laterally continuous, either laminated or massive beds up to 15 cm thick.
Cross-arms are exploding laterally and, at the same time, moving to the center.
