Trace the marks of geologic history left on this National Park in Texas. Examine a time line and era descriptions for this North American park.
Understand the 900 million year geologic development of Rock Canyon from this profile. Includes a virtual tour through the canyon.
Peruse a geologic time scale chart with descriptions of events. Read about the earliest life in the Archaean Eon of the Precambrian period.
U.C. Berkeley Paleontology Museum's profile of the Cretaceous period covers its ancient life, localities and stratigraphy.
Find fossils information, time profiles, and rock photographs from the different eons, eras, and periods in the Earth's history.
Learned dinosaur teaches the approximate age of the Earth here. Find a colorful chart detailing the Earth's eras by millions of years.
Located on the Yucatan Platform, this areas history of sediment and seawater evolution is profiled here. Includes several diagrams of change.
Find a detailed chart of the Earth's geologic ages categorized by era, period, sub-period, epoch, and age. Download this document for Excel.
Archive of geologic events is designed to give proportion to the history of the earth. Examine the properties of the four billion year old beer.
Institute in St. Petersburg, Russia explores all aspects of the Precambrian period. Tour the facilities and meet the staff.
Explore the most recent of the three major subdivisions of animal history, a period which extends from 65 million years ago to the present.
Enjoy the U.C. Berkeley Museum of Paleontology's overview of the Mesozoic era and its Triassic, Jurassic and Cretaceous time periods.
Overview of the Jurassic period from the U.C. Berkeley Museum of Paleontology. Learn about its plant and animal life, climate, and stratigraphy.
View the Earth's geologic history first-hand on the San Juan River river in Utah. Day and overnight trips available.
Summarizes the life forms and geologic activity that mark this time period.
Learn more about one of the many periods in geologic history before the Ice Age.
Discussion on this geological period focuses on the plate movements, climate, and the characteristic flora and fauna.
Find out what life was like nearly 55 million years ago when the initial forms of the horse, camel, and primates appeared.
Encyclopedia entry details the period of time from 24 to 5 million years ago known for its vast geographic changes.
Offers a brief overview of the geologic period associated with the carboniferous period.
Details the division of the Cenozoic period and describes the periods that preceded it and the geologic phenomena of the period.
Details life forms and geological changes that occurred during the second period of the Paleozoic era.
Details the geologic changes during the shortest period of the Cenozoic era. Describes the splitting of Pangaea.
Details what is recognized as the later part of the Carboniferous period.
Details the widespread crustal unrest of the last part of the Paleozoic era.
Describes the fifth division of the Cenozoic era that gave rise to the volcanic Cascade Range and the Alps.
Details the period of time in which oceans and atmosphere began to develop. Describes the earliest rocks, gneisses and komatiites.
Offers an overview of geologic time periods including the Stone, Bronze, and Iron Age.
Describes the eras following the Tertiary period noted for vast glacier ice coverings.
Details the geologic period in which the supercontinent of Gonwanaland was developed.
Furnishes an overview of the period in which tools and weapons were fashioned from stone.
Details the stretching of the earth's crust and early development of African Gondwanaland.
Travel through different eras millions of years ago in the Earth's history. Includes an introduction to geologic time from UC Berkeley.
Learn about the plants, animals and environment of the Paleozoic era through graphics, animation and interactive articles.
Introduction to the Pliocene and the final stages of a global cooling trend that led up to the Quaternary ice ages. Includes references.
Read through lecture notes on the different methods of measuring geologic time. Includes an introduction to radioactive dating.
United States Geological Survey monitors earthquake and volcanic activity in this area. Read a geologic history of the valley here.
Guidebook describes these ancient coral reefs, located in New Mexico's Guadalupe and Delaware Mountains. With photos, diagrams and bibliography.
Examine the curriculum of a course on geologic history of the Earth and Connecticut. Includes global-plate tectonics, native rocks, and glaciers.
Guide to the animal and plant life, geology, and climate conditions of the Cretaceous period. Also learn about the end of the dinosaurs.