Definición de graptolite en inglés:

graptolite

Saltos de línea: grap¦to|lite
Pronunciación: /ˈɡraptəlʌɪt
 
/

sustantivo

A fossil marine invertebrate animal of the Palaeozoic era, forming mainly planktonic colonies and believed to be related to the pterobranchs.
  • Class Graptolithina, phylum Hemichordata
Más ejemplos en oraciones
  • The Ordovician is best known for the presence of its diverse marine invertebrates, including graptolites, trilobites, brachiopods, and the conodonts (early vertebrates).
  • Other marine fossils commonly found throughout the Silurian record include trilobites, graptolites, conodonts, corals, stromatoporoids, and mollusks.
  • To return to our example, the usual biostratigraphic markers in Middle Paleozoic stratigraphy are graptolites, conodont ‘jaw’ parts, and thelodont scales.

Origen

mid 19th century: from Greek graptos 'marked with letters' + -lite: so named because of the impressions left on hard shales, resembling markings with a slate pencil.

Definición de graptolite en:

Obtener más de Oxford Dictionaries

Subscribirse para eliminar anuncios y acceder a los recursos premium

Palabra del día fioritura
Pronunciación: fɪˌɔːrɪˈt(j)ʊərə
noun
an embellishment of a melody...