Clonograptus
![Graptolites, like this Amplexograptus from the Ordovician near Caney Springs, Tennessee are good zone fossils. A zone fossil must have a short time span but a common animal of the time. Graptolites became extinct at the end of the Devonian.](/Images/godic/202501/05/DiplograptusCaneySprings5116.jpg")
Clonograptus is a genus of graptolites. Groups of these animals were connected by stalklike structures to a central region. Species of Clonograptus are zone fossils, that help us estimate a precise age of Ordovician rocks.
Clonograptus
英语百科
- STEAMING of tobacco
- steaming of wood
- steaming operation
- steaming out
- steaming out line
- steaming out system
- steaming out tank
- steaming part for permeation
- steaming plant
- steaming point
- steaming power
- steaming process
- steaming radius
- steaming range
- steaming rate
- steaming surface
- steaming temperature
- steaming test
- steaming the medicinal herbs
- steaming time
- steaming treatment
- steaming up
- steaming vessel
- steaming washing therapy
- steaming with the sea on the bow