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trilobites appeared about 524 million years ago. We found this out by using relative dating (which is comparing the age of two fossils) and the most reliable absolute age (which tells you how old the fossil is by measuring radioactivity. The more radioactivity the older the fossil)
What else can I help you with?
Where do trilobites live?
Where DID trilobites live? In the ocean, between 530 million and 250 million years ago.
How did trilobites reproduce?
they reproduced asexually
What is the approximate age of the oldest trilobite?
Trilobites appear about 524 million years ago. The "First Appearence Datum" (FAD) of trilobites defines the start of the 2nd Epoch of the Cambrian Period. Trilobites therefore play a very important role in biostratigraphy of the Paleozoic.
When did trilobites first appear in fossil record?
The first trilobites appear about the same time in Siberian, Moroccan and North American strata of about 524 million years of age, at the start of series 2 of the Cambrian Period. The first trilobites include fallotaspidoids Profallotaspis, Eofallotaspis, and Fritzaspis, but also include an ellipsocephaloid, Hupetina. For the role of trilobites in biostratigraphy, see this page: http://www.trilobites.info/biostratigraphy.htm
Are trilobites warm or cold blooded?
Trilobites were warm blooded creatures that lived in the ocean from the cambrian period all the way until they were wiped out in in the permian period.
What era did trilobites show up in?
Paleozioc
When did trilobites become extinct?
Trilobites became extinct about 250 million years ago, in the Mesozoic Era.
How long ago did trilobites live?
Trilobites lived in the Palaeozoic era, between 300 and 500 million years ago.
What subphylum of Arthropoda is completely extinct in present era?
The Trilobites.
What organism covered the ocean floor for much of the Paleozoic Era?
Trilobites
Are there trilobites in Aruba's volcanic rock?
No. There are two reasons for this.You generally do not find fossils in volcanic rock.Aruba formed after trilobites went extinct.
In which geoligic era did trilobites and sharks coexist 1 Cenozoic 2 mesozoic 3 Paleozoic 4 Precambrian?
precambrian is when all humans and living things and sharks existed of course
What geologic time period was the trilobite fossil associated?
Trilobites were associated with the Paleozoic era, from the Cambrian to the Permian.
What are three types of marine animals that left fossils from the Paleozoic era?
Three types of marine animals in the Paleozoic Era were trilobites, brachiopods, and archaeocyathids.
What time period was the creature trilobite in?
Trilobites originated during the Cambrian era, flourished through the Paleozoic era, declined during the Devonian era, and finally became extinct in the Permean mass extinction event. In total there were live trilobites on the earth for about 290 million years.
When did The Trilobites end?
0.2 - 32 inches
When was The Trilobites created?
The Trilobites was created in 1984.
