抄録
Polarizing a microscopy and X-ray diffraction analysis showed that the fossil dinosaur eggshell fragments (titanosaurid from the Argentina) were composed from silica (quartz) and calcium carbonate (calcite). The mineral composition and detailed texture for the silicified dinosaur eggshell have been reported here. The quartz may be formed by the secondary substitution preserving an initial microstructure of the eggshell, and the calcite was seemed to be tertiary deposit filling spaces made by some micro-organic activity or else.
https://ror.org/05jk51a88 
