Precambrian stromatolites have received in depth, consideration from
geologists and paleontologists; they were indeed searching for
biosedimentary structures that were sufficiently characteristic and
widely distributed to be considered as useful tools for stratigraphic
correlation. Silicified stromatolites are also of interest as they
contain preserved traces of ancient life. Calcareous Phanerozoic
stromatolites have not received very much attention from geologists.
Logan's too schematic morphological classification of 1964, was not so
helpful to the knowledge of Phanerozoic stromatolites because neither
their morphology nor their microstructure were studied in the same
detail in which Proterozoic stromatolites have now been described. We
therefore know little about the Phanerozoic stromatolites which, do,
however, show an interesting range of diversification. A major questions
stiII remaining to be answered include the history of stromatolite
development and wether their morphology has "evolved" in addition to
detailed information concerning Cenozoic nonmarine stromatolites which
precipitate carbonate and the Recent giant stromatolites which trap
particles. For these reasons Claude Monty, in 1981, launched the first
volume of what was going to be a series on "Phanerozoic stromatolites"
in order to describe their morphology, microstructure and paleoecology
and to present them in their stratigraphic context.