[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
SV: "carbonatic" eggshell query
As far as I know at least all bird eggshells are largely "carbonatic" in
the sense that they are mostly Calcium Carbonate (there is also a small
proportion of organic material, and some also contain a small amount of
Calcium Phosphate). In so far as pterosaurs had hard eggs I imagine they
would be similar.
Soft eggs (often described as "leathery") have membraneous shells that
are a mixture of organics (mostly proteins) and calcium carbonate. The
carbonate may be either a thin continuous layer or nodular.
Från: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu] För David
Skickat: den 27 september 2009 16:58
Till: dinosaur mailing list
Ämne: "carbonatic" eggshell query
Chiappe et al. 2004 described the Pterodaustro eggshell as
"carbonatic" . A Google query listing "eggshell" and "carbonatic"
listed only the Chiappe et al. article.
What does "carbonatic" mean in terms of eggshells? What is this like?
What is this not like?