編號 89986221
美麗的外星人化石 - 14 個標本 - mortality plate化石 - Ascocystites - Eocrinoids
編號 89986221
美麗的外星人化石 - 14 個標本 - mortality plate化石 - Ascocystites - Eocrinoids
This alien-looking fossil is a nice plate of very detailed Eocrinoids of the genus Ascocystites collected near Kaid Errami, Morocco.
Eocrinoids are one of the earliest-known groups of echinoderms.
This plate present 14 specimens, 13 on front side and 1 on back side..
The bright yellow-orange coloration due the oxidization of iron pyrite is very beautiful and showy, set off the pink color of the matrix quite well.
Larger specimen is 10 cm.
An interesting aspect: ALL the specimens are oriented in the same direction, indicating a sea stream at the time of death.
Enhancements note:
this specimen come from very rich iron hydroxide Fe(OH)2 layers which is brown yellow color.
As tentacles and the stalk fossilized almost 3d the hydroxid Fe(OH)2 hydrate and so become ferric oxyhydroxide which is mostly black color.
What we do is to visually highlight the different between the hydroxid Fe(OH)2 and the ferric oxyhydroxide ( body and tentacle and stalk) using Reviver for stones and some oxide.
So the enhancements job is about 15-20% on the real aspect when the fossil is found.
Plate is 35 cm high.
It can be displayed in two different ways.
Stunning piece of ancient "life", 450 milions years old.
Plastic standing included.