fabrics fall broadly into two basic types: prisms (columnar) and folios (sheets).
The OS seam can be distinguished from footwall (FW; chert with < 10 cm thick interbeds of phosphatic mudstone and calcitic
veins) and overburden (chalk and chalky limestone with minor chert) by significantly higher API values (Fig.
B, Thin section under cross polarized light where the calcitic
character of the sample is observed.
For skeletal mineralization, the avian embryo mobilizes calcium from its calcitic
The Malagawatch Formation has not yet been subdivided into members but consists of an assemblage of rock types similar to those of the Blues Brook Formation, including metasiltstone, slate, calcitic
and dolomitic marble, calc-silicate rocks, minor quartzite, and mafic metavolcanic rocks (Justino 1991).
limestone (CaC[O.sub.3]) does not yield magnesium upon dissolution, but the ratio of calcium: magnesium is 1.64 following dissolution of pure dolomite (CaC[O.sub.3] x MgC[O.sub.3]).
2) confirmed nearly pure, radiating calcitic
tufa morphology indicative of subaqueous formation.
Verrecchia (1999), "Calcitic
Radial Palisadic Fabric in Freshwater Stromatolites: Diagenetic and recrystallized feature or physicochemical sinter crust?," Sediment.
Matrix is mostly calcitic
with very rare iron oxide.
is the only known hard, calcitic
, reef-building alcyonarian (soft) coral.
microlenses as part of the photoreceptor system in brittlestars," Nature, vol.
In vitro regulation of CaC[O.sub.3] crystal growth by the highly acidic proteins of calcitic
sclerites in soft coral, Sinularia polydacta.
In order to determine the type of mineralogy and diagenetic systems of Tarbur Formation carbonates, major (Mg and Ca) and minor (Fe, Mn, Sr and Na)elements measured in this carbonates, and with against plotted of them, were compared whit other different researchers limits that was presented to determination of Aragonitic and Calcitic