GTS
Geologic Time Record
is a tabular representation of the major divisions of the Earth's history. The time intervals are divided and described from the longest to the shortest as EONS, ERAS, PERIODS and EPOCHS.
CAMBRIAN EXPLOSION
is the belief that there was a sudden, apparent explosion of diversity in life forms about 545 million years ago. The explosion created the complexity of multi-celled organisms in a relatively short time frame of 5 to 10 million years. This explosion also created most of the major extant animal groups today.
Phanerozoic Eon
is the most recent eon and began more than 500 million years ago.
Era
Eons are divided into smaller time intervals known as
Periods
Eras are subdivided into ______. events that bound the periods are widespread in their extent but are not as significant as those which bound the eras.
Epochs
Finer subdivision of time are possible, and the periods of the Cenozoic are frequently subdivided into
Cenozoic, Mesozoic, Paleozoic
In the time scale, Phanerozoic is divided into three eras:
Geologic Time Scale
Is a system of chronological dating relates geological strata to time.
Geologic Time Scale
It is used by geologists, paleontologists, and other earth scientist to describe the timing and relationships of events that have occurred during earth's history.
Permian, Pennsylvanian, Mississippian, Devonian, Silurian, Ordovician and Cambrian periods
Paleozoic is subdivided into the
Hadean, Archean, Proterozoic and Phanerozoic
The Geologic time is divided into four large segments called Eons:
oldest, youngest
The earth carries the history of geological events in its rock layers. It follows that the _________ layers are at the bottom and the _________ are at the top,
radiometric dating
The relative geologic time scale developed from fossil record has been numerically quantified by means of absolute dates obtained with _________
EONS, ERAS, PERIODS and EPOCHS
The time intervals are divided and described from the longest to the shortest as
Eons
Are the largest intervals of geologic time and are hundreds of millions of years in duration.
geologic record
Because living things have undergone evolutionary changes over geologic time, particular kinds of organisms are characteristic by particular parts of the _____
Anthropocene
defines earth's most recent geologic time period as being human-influenced. Unofficial interval of geologic time, making up the third world wide division of the quaternary period((2.6million years ago to the present), characterized as the time in which the collective activities of human beings.
