A period of the Paleozoic era (408-360 million years ago). The Devonian follows the Silurian and precedes the Mississippian era.
The geological period from about 409 million years to 362 million years ago. Named after rocks in Devon. At this time much of (northern) Britain formed land and sediments are characteristics desert sandstones (and lake deposits) - the Old Red Sandstone.
The fourth period of the Palaeozoic. Spans 409-353Ma. The rocks of this period are referred to as Old Red Sandstone (ORS) as they are often red coloured sandstone. The name originates from the county of Devon in South West England. The colonisation of lan... More
"a geological period in the Palaeozoic era that extended from the end of the Silurian (about 480 million years ago) to the beginning of the Carboniferous (about 360 million years ago)" (173).
A division of geological time from 410 to 360 million years ago. Named for the rocks of that age in Devon.
A period of geological time, dating from about 420 to 350 million years ago.
A period of the Paleozoic era (after the Silurian and before the Mississippian), thought to have covered the span of time between 400 and 345 million years ago; also, the corresponding system of rocks. It is named after Devonshire, England, where rocks of this age were first studied.
Period of geologic time 345-395 million years ago.
A Geological epoch from 400 to 350 million years ago.
A Geological Period that began about 345 million years ago in the Paleozic era. The insects and vertebrates made their first appearances during this time.
from 405 million to 345 million years ago; dominance of fishes and appearance of amphibians and ammonites
A geological period from 413 to 362 million years ago.
Period of geological time about 400 - 300 million years ago.
Belonging to the geologic time period from 405 million to 345 million years ago. The period was characterized by the appearance of amphibians and insects and the first forests.
Unit of rocks identified by William Lonsdale and named for Devonshire, England. Overlies the Silurian in the Paleozoic.
It is the geological period which is 417 to 354 million years ago.
the interval of geologic time from about 410 to 360 Million Years ago. the Devonian is part of the Palaeozoic era.
n. An interval of the Paleozoic Era that follows the Silurian and precedes the Carboniferous. It is thought to have covered the span of time between about 408 and 360 million years ago. It is commonly known as the Age of Fishes.
Part of the Palaeozoic geological time scale ranging from 410 to 355 million years ago.
the fourth epoch of the Palaeozioc era, the first in the Upper Paleozoic, lasting for 50 million years during which amphibians first appeared; named after the English county of Devon, where outcrops of these rocks occur.
A period of time in the Paleozoic Era that covered the time span between 400 and 345 million years.
A period of the Paleozoic era, spanning the time between 410 and 360 million years ago. It is named after Devonshire, England, where rocks of this age were first studied.
(see Geological Timescale)
Geological period 395 – 345 million years ago.
A period of geological time extending from 320-280 million years BP.
The fourth of the six Geologic Periods of the Paleozoic Era. It extends from the end of the Silurian Period (about 395 million years ago) to the beginning of the Carboniferous Period (about 345 million years ago).
the period of geological time between 410 and 360 million years ago. The name comes from the strata in Devon, S.W. England, which define this part of geological history. The Devonian is also known as the Old Red Sandstone (often referred to as O.R.S.) because the characteristic colour of the rocks is red. The red colour is because of a high iron content in the rock, and tells us that the climate was hot and dry when they were deposited. See Geological Timescale.
The fourth period, in order of decreasing age, of the periods making up the Paleozoic era. It followed the Silurian period and was succeed by the Mississippian period
a geological period from around 350 to 405 million years ago when the first trees, forests, spiders and insects appeared
Middle Paleozoic age ranging from 410 Ma to 360 Ma.
The fourth period of the Paleozoic Era. The Devonian Period includes the time from 417 to 354 Mya. The Early Devonian comprises the Lochkovian, Praghian and Emsian Ages (417-391 Mya). The Middle Devonian includes the Eifellian and Givetian Ages (391-370 Mya); and the Late Devonian is divided into the Frasnian and Famennian Ages (370-354 Mya). The Devonian is the "Age of Fishes" between the Silurian and Carboniferous Periods.
A geological period that extended from 395 Ma ago to 345 ma ago. Named after the county of Devon in England.
A period of time stretching from 417 - 354 million years ago.
the fourth period of the Paleozoic era, after the Silurian and before the Mississippian, characterized by the appearance of amphibians, wingless insects, and forests; rocks formed during this period. [AHDOS