Definición de graptolite en inglés:

graptolite

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

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.

Más definiciones de graptolite 

Definición de graptolite en: 

Obtener más de Oxford Dictionaries

Subscribirse para eliminar anuncios y acceder a los recursos premium

Palabra del día tortie
Pronunciación: ˈtɔːtiː
noun
a tortoiseshell cat