algal, columnar, modern, recent, ancient, archean, fossil, phanerozoic, marine, domal, subtidal, oldest, lacustrine, small, skeletal, archaean, calcareous, bacterial, abundant, most, early, shaped, conical, intertidal, precambrian, associated, digitate, laminated, silicified, giant, gymnosolenid, phosphatic, potential, proterozoic, bahamian, associate, riphean, triassic, domical, neoproterozoic, carboniferous, hemispherical, lichen, modem, rare, flat, like, freshwater, siliceous, shallow, extant, devonian, earliest, pelagic, fossilized, contemporary, abiogenic, marginal, day, discrete, distinctive, nonmarine, elongate, bearing, developed, cyanobacterial, domed, younger, micritic, dolomitic