PPT-GEOLOGIC TIME UNIT - 9 GEOLOGIC TIME

Normally we think of time in terms of days or years but geologists commonly refer to events that happened millions or billions of years ago For example earth is approximately 46 billion years old GEOLOGIC TIME. Comparison of Conventional & Short-Age Geology. Faith, Reason, and Earth History. Chapter 14. by Dr. Leonard Brand. Short-age. Geology. Conventional. Geology. Assumptions. Interpretations. Challenges. How long ago were the dinosaurs here? How do we even describe geologic time anyway?. EONS. which are divided into . ERAS. ,. which are divided into. . PERIODS. ,. which are divided into. . EPOCHS. 8. th. Grade Science. Geologic Time. Geologic time. . - Earth’s history is divided into units of time that make up the . Geologic . T. ime . S. cale. .. Time units on the scale are based on the appearance (. Relative Dating. How old is the Earth?. The Earth is about 4.6 billion years old. Much of its history is recorded in the rocks. Observations of fossils, rock types, evidence of . faulting, uplift, and folding as well as igneous . To learn how the geologic timeline was made and how the length of the various periods are different. Agenda. Progress reports – need to be signed by Parent/guardian. Geologic History Notes. Project –highlights. East-Central Idaho — . Metasedimentary. Strata, . Ore . Types, . Folds, Dikes, and Metamorphic Overprint. Art . Bookstrom. , Steve Box, Pam Cossette, . Tom Frost, and Shane . Kostka. . Regional Geologic Map showing the Mesoproterozoic Belt-Purcell basin and the Lemhi sub-basin . The geologic time scale divides Earth’s long history into units of time…. Eras. .  . Periods. .  . Epochs. Eras. are divided into . P. eriods. .. Periods. are divided into . Epochs. .. Precambrian. Favs. .. . Where do sediments come from?. - Weathering. – breaking down rock into smaller pieces chemically and physically.. - Erosion. - carrying away the particles and depositing them. . Glaciers. a. Fossils. 3. Geologic Time Scale. 4. Geologic Belts. 5. NC Geologic History. How do we know . geologic . history. ?. Earth's History. Earth's history spans over a length of . 4.5 billion . years. Geologists have divided that time into units based on major geologic events and life forms. Relative age dating:. Age of a rock compared to other rocks. Used to understand a sequence of events. What are the ways to tell . RELATIVE AGE. .. 1. Law of Superposition (Undisturbed) . 2. Extrusion & Intrusion (Igneous Rock). 99.9% of all living things that have ever existed on earth have gone extinct. earth has experienced 5 five extinctions . Geologic time scale. Era. Largest unit of geologic time . lasts tens to hundreds of millions of years and consists of two or more periods. . . Moving . Toward 3D Geologic Data. 13 April . 2020. Alaska Division of Geological & Geophysical Surveys. . 3354 College Rd, Fairbanks AK 99709. Mike Hendricks, Jen Athey, Trish Ekberg, Chris Wyatt, et al. On the Cutting Edge – Professional Development for Geoscience Faculty . Teaching About Time Workshop. Ilyse Resnick. Premise of talk. The representation of extreme temporal magnitudes is subject to the same forces that guide our comprehension of conventional time. What is it and Why do we care? . What is the geologic time scale? . . Geologic Time Scale:. A record of the Earth’s . history broken up into . various units of time that. are based on types of . fossils contained within .