silurian in English
Conventionally, the Cambrian, Ordovician, and Silurian systems constitute the Lower Palaeozoic and the Devonian, Carboniferous, and Permian comprise the Upper Palaeozoic.
Use "silurian" in a sentence
1. The Batholith formed during a Late Silurian to Early Devonian melting and rifting event that split the Ordovician to Early Silurian Macquarie Arc.
2. Bryozoan fossils can be found in Kentucky's Ordovician, Silurian, Devonian, Mississippian, and Pennsylvanian rocks
3. A new Anaspid fish from the middle Silurian Cowie Harbour fish bed of Stonehaven, Scotland
4. În cambrian, silurian și devonian au existat numeroși reprezentanți ai Agnatelor cunoscuți cu
5. Anaspida is a morphologically unique group among jawless vertebrates known only from the Silurian and Lower Devonian
6. They form the filling of several craters and pipes, which are unconformably overlain by Ordovician respectively Silurian sediments.
7. Silurian Cartilaginous fish are known only from scales, a few teeth, and small disarticulated fossils (Qu, 2010)
8. Agnatha is the most ancient group of vertebrates, widely distributed in the Silurian and Devonian periods
9. 8 A rift trough along Mianxian - Lueyang ophiolitic melange belt was formed from Ordovician to Silurian.
10. Anaspid - extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian
11. In Northern Spain, sections of Ordovizian and Silurian, being complete towards the west, develop unconformities and diastemes towards East.
12. (2) The higher Stolzalpe nappe, metamorphosed very low to low grade, contains Ordovician to Lower Silurian volcanic formations.
13. Anaspid - extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian agnathan,
14. Thermal, alternating field (AF), and two-stage (AF followed by thermal) experiments performed on one Silurian (Mascarene Group) and two Devonian (St.
15. This genus is known in the fossil record from the Silurian to the Carboniferous (age range: 428.2 to 314.6 million years ago).
16. Some Silurian Brachiopods lacked a stalk, had a flattened shell form (figure 3b), and rested freely on the seafloor
17. This rock unit consists Chieflyof Silurian shale and sandstone that have been metamorphosed to high-grade schist and migmatite
18. At least 43 species of Brachiopods represent the most diverse group of dwellers in the Silurian reefs of Wisconsin and Illinois.
19. Until a few decades ago, Palaeophonus, similarly to many other scorpions of the Silurian, was thought to be one of the earliest animals to have conquered the land.
20. Conodont — the problematical small tooth like fossil of the Cambrian, Silurian and Devonian periods which could well be a tooth of Cyclostomata … Dictionary of ichthyology
21. ! oldest known fossils of terrestrial animals are Chelicerate arthropods from 420 M years ago (Silurian) Transition to land required major adaptations: a
22. 19 So by mid-Silurian times the plates that are now in the northern hemisphere were again stable and low in relief.
23. Apterygote Insects The insects probably evolved from some primitive member of the superclass Myriapoda during the Silurian period (400-440 million years ago)
24. Bulletin 23 Abstract: A large fauna of Arenaceous Foraminifera comes from exposures of the Brassfield Limestone (Albion Series, Silurian) in Franklin, Ripley, Jefferson, and Clark Counties, southeastern Indiana
25. Extinct small freshwater jawless fish usually having a heterocercal tail and an armored head; of the Silurian and Devonian Familiarity information: Anaspid used as a noun is very rare.
26. The Carboniferous was the second-to-last period of the Paleozoic Era (541-252 million years ago), preceded by the Cambrian, Ordovician, Silurian, and Devonian periods and succeeded by the Permian period
27. Anaspid definition, any member of an extinct order, Anaspida, of small, freshwater jawless fishes of the Silurian and Devonian periods, characterized by a single nostril, narrow rows of scales, and, usually, an armor-plated head
28. The Cambrian was the first period of the Paleozoic Era (542-250 million years ago), followed by the Ordovician, Silurian, Devonian, Carboniferous and Permian periods; all of these periods, as well as the succeeding Mesozoic and Cenozoic Eras, were dominated by the vertebrates that first evolved during the Cambrian.
29. The rock strata date from the Prídolí Epoch of the Silurian; the exceptional exposure here and on the adjoining Albion Sands have resulted in the location's inclusion in the Geological Conservation Review as a candidate for protection as a geological site of special scientific interest (SSSI).
30. A: Spyroceras, a common Ordovician and Silurian Cephalopod with a straight and ridged shell [10 cm].B: Richardsonoceras, common in Ordovician rock [11 cm].C: Crescent-shaped Richardsonoceras [5.5 cm].D and E: Examples of Whitfieldoceras, an Ordovician Cephalopod with a constricted body chamber [2.5 and 5 cm, respectively].
31. Caledonian orogenic belt, range of mountains situated in northwestern Europe, developed as a result of the opening, closure, and destruction of the Iapetus Ocean in the period from the start of the Cambrian (542 million years ago) to the end of the Silurian (about 416 million years ago).