Changes

'''Cambrian'''

The '''Cambrian''' [[period (geology)|period]] is part of the [[geologic system]] of classifying geologic formations.

The '''Cambrian''' period was the first period of the [[Paleozoic]] era. Following on from the [[Pre-Cambrian]], it lasted from approximately 543 million years to about 490 million years ago. It was followed by the [[Ordovician]] period. The Cambrian was named by the geologist Adam Sedgwick for Cambria,<ref>http://www.ucmp.berkeley.edu/history/sedgwick.html</ref> Latin for [[Wales]], which has large areas of rock originating in, and characteristic of, the period.

The Cambrian was named by the geologist [[Adam Sedgwick]] for Cambria,<ref>http://www.ucmp.berkeley.edu/history/sedgwick.html</ref> Latin for [[Wales]], which has large areas of rock originating in, and characteristic of, the period.

The [[Cambrian Radiation]] gave rise to almost all living phyla, but often in extinct forms with small resemblance to typical living species. Common Cambrian fossils are of [[trilobite]]s, and inarticulate [[brachiopod]]s,<ref>http://www.palaeos.com/Paleozoic/Cambrian/Cambrian.htm#bio</ref> [[coral]]s and primitive [[echinoderm]]s. They also include the first vertebrates, primitive jawless fish.

Under the uniformitarian dates assigned by secular geologists, it represents approximately the period of Earth's history from about 542 million years ago to 488 million years ago.<ref>Gradstein, F.M., and Ogg, J.G.,[http://www.stratigraphy.org/scale04.pdf Geologic Time Scale 2004 – Why, How, and Where Next!]</ref> Young Earth creationists reject the uniformitarian assumptions behind the dates derived by secular geologists, so reject these dates (see [[geologic system]]).

Since many of the organisms of the Cambrian were soft-bodied invertebrates, fossil remains other than shells or carapaces are rare; one notable site for soft-bodied Cambrian invertebrate remains is the [[Burgess Shale]] of [[British Columbia]].<ref>http://wwwalt.uni-wuerzburg.de/palaeontologie/Stuff/casu9.htm</ref>

Evolutionists believe that the [[Cambrian Radiation]] gave rise to almost all living phyla, but often in extinct forms with small resemblance to typical living species. Common Cambrian [[fossil]]s are of [[trilobite]]s, and inarticulate [[brachiopod]]s,<ref>http://www.palaeos.com/Paleozoic/Cambrian/Cambrian.htm#bio</ref> [[coral]]s and primitive [[echinoderm]]s. They also include what are considered to be the first [[vertebrate]]s, "primitive" jawless fish.

 

Fossil remains other than shells or carapaces are rare, leading evolutionists to conclude that many of the organisms of the Cambrian were soft-bodied [[invertebrate]]s.  One notable site for soft-bodied Cambrian invertebrate remains is the [[Burgess Shale]] of [[British Columbia]].<ref>http://wwwalt.uni-wuerzburg.de/palaeontologie/Stuff/casu9.htm</ref>

== Young earth creationist scientists view ==

== Young earth creationist scientists view ==