Undulatory algal fragment limestone in conglomerate and limestone unit
Slab of algal fragment micritic limestone from an undulatory
limestone
layer in the conglomerate and limestone unit. The patchy fabric shows
either that the sediment was thoroughly churned by burrowers, or that
the bed formed by amalgamation of originally separate lumps of
carbonate sediment. White to light yellowish green patches and streaks
are composed of clays that locally serve to delineate nodular masses
(the “lumps”) of limestone. The arched embayment and somewhat
triangular indentation at the bottom of the slab shows where the
limestone formed around claystone clasts that projected up from the
sea floor. The claystone disintegrated when the limestone was dug out
from the outcrop.