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graptolite Palæont.|ˈgræptəlaɪt|
[f. Gr. γραπτό-ς painted or marked with letters + -lite; in sense 1 ad. mod.L. graptolithus (Linnæus).]
†1. Any stone exhibiting a resemblance to a drawing. Obs.
1838Penny Cycl. XI. 363/1 The Florentine, or ruin marble, the dendritical ramifications on many limestones, and the moss-like forms in agates, &c., were ranked [by Linnæus] as Graptolites. 1847in Craig.
2. A fossil zoophyte of the genus Graptolites (or Graptolithus) or of the family of which this genus is the type.
(The graptolites are known from their impressions on the surface of hard shales, resembling markings with a slate pencil. Some suggest the form of a quill pen.)
1841Trans. Geol. Soc. Ser. ii. (1842) VI. 558 Graptolites were found at Robleston..in calcareous shales. 1872Nicholson Palæont. 11 If the Graptolites belong to certain genera, we may be sure that we are dealing with lower Silurian Rocks.
Comb.1863A. C. Ramsay Phys. Geog. vi. (1878) 83 The graptolite-bearing mud.
Hence graptoˈlitic a., of or pertaining to graptolites; containing graptolites.
1843Portlock Geol. 231 Another graptolitic bed in Fermanagh. 1849Murchison Siluria v. 96 The supposed fucoids..belong to graptolitic or other zoophytes. 1880Ramsay in Times 26 Aug. 5/3 The Lower Silurian graptolitic rocks at Corswall Point in Wigtonshire. |