silurian period การใช้

• Quartizite from the Silurian Period can be found in this water gap.
• These rocks are 414 million years old from the Silurian period.
• The sea withdrew from Minnesota for the duration of the ensuing Silurian period.
• The rocks at the site date to the Silurian period of geological time.
• The same erosional and depositional processes continued on through the ensuing Silurian period.
• Thus, the first insects probably appeared earlier, in the Silurian period.
• The state was submerged by the sea once more during the ensuing Silurian period.
• Laurasia was created near the end of the Silurian Period.
• It is the only marrellomorph known from the Silurian period.
• This was followed by plants emerging in late Ordovician Period and early Silurian Period.
• These rocks are from 414 mya in the Silurian period.
• This thick sedimentary deposition continued into the Silurian period ( 444-416 million years old ).
• The other one third of the rocks in Montour County are from the Silurian Period.
• Casey is underlaid by rocks from the Silurian period.
• Illinoisan trilobites diversity and abundance suffered further losses after the end of the Silurian Period.
• First appearing in the Silurian period, millipedes are some of the oldest known land animals.
• The Blue Ridge Mountains began forming during the Silurian Period over 400 million years ago.
• The extinctions occurred approximately and mark the boundary between the Ordovician and the following Silurian Period.
• The Silurian period, occurring 439 million years ago, has been well preserved nearby, in Wenlock Edge.
• The sedimentary rocks in Montour County are from either the Devonian Period or the Silurian Period.