from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of numerous extinct colonial marine animals chiefly of the orders Dendroidea and Graptoloidea of the late Cambrian to the early Mississippian periods, whose fossil remains are often used to date the rocks of the Silurian and Ordovician ages.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a group of extinct aquatic colonial invertebrates, of the class Graptolithina, from the Cambrian and Carboniferous periods
from the GNU version of the Collaborative International Dictionary of English
- n. One of numerous species of slender and delicate fossils, of the genus Graptolites and allied genera, found in the Silurian rocks. They belong to an extinct group (Graptolithina) supposed to be hydroids.
from The Century Dictionary and Cyclopedia
- n. One of the Graptolithidœ, Graptolithina, or Rhabdophora; a specimen or a species of Paleozoic cœlenterate organisms, commonly supposed to be hydrozoans, resembling the living sertularians in having a horny polypary, and in having the separate zoöids protected by little horny cups, all springing from a common cœnosarc, but differing in that they were not fixed to any solid object, but were permanently free.
- Same as graptolitic: as, a graptolite schist.
Palaeozoic rocks have not been discovered so far in this region, although a graptolite fossil, probably of Ordovician age, shows that they occur in the South Orkneys.
I have placed beside this specimen a fragment of the same graptolite-bearing rock, across which I have pasted part of a leaf of _Zostera marina_, the only plant of our
The graptolite-bearing grauwacke of Banffshire seems to have been the only fossiliferous rock that occurred throughout the extent of this ancient northern basin.
The 404 292: Where Caroline McCarthy bears her graptolite to The 404