07348 - Beautiful 1.07 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Mammites nodosoides Taemasaspis
Yard notes & kiln story
Description
Taemasaspis
Mongolia (9)
Impressive specimen with the natural association of 2 brittlestars of the genus Ophiura
-The bottom of the digit claw is flat
Pricyclopyginae
07348 - Beautiful 1.07 Inch Chalcedonized Fossil Gastropod Cretaceous Dakhla Mammites nodosoides TaemasaspisChaledonized gastropods (specimen at fat left is 3. 0 cm tall) these snail shells have been replaced by translucent, fibrous, microcrystalline quartz (SiO2). This variety of quarz is called chalcedony. Chalcedonization is a variety of silicification. Chalcedonized fossils are uncommon.