PPT-Geologic Era

Mesozoic Cambrian and Ordovician Cenozoic PreBelt PreCambrian Paleozoic Page 1 Geologic Timeline For example using fossils geologists can compare certain geologic strata in Montana with the type section of Devonian age rocks in Devon England and determine that their ages are the same Radiometric dates tell us that Devonian rocks fall in a range of 369410 million years ago. Astronaut Video: . Sarychev. Volcano Eruption. Lithology. – rock type of surface rocks and bedrock. Structure. – folding, faulting and deformation of rocks . Landforms. . – terrain features formed by natural processes that appear similar wherever they are found (Way 1973); Can be erosional or depositional. Chapter 21.1, 22, 23, 24. Why do we care?. By studying the characteristics of rocks and fossils within them, geologists can interpret. The environment the rocks were deposited in. Reconstruct Earth’s history. 01: . Geologic Time . Scale. Huge sections of time are broken down into smaller groups of time:. E. ons, Eras, . P. eriods, and . E. pochs. Eon. is the largest time block. . (kind of like what we would think of as years).. Pre-Plastic Era – The Toothbrush. Dated back as far as 3500 BC. The earliest know toothbrush was made by chewing on a twig until it became soft like a brush.. 1600s – 1800s. The next invention of the toothbrush is made from bone handles and bristles made from pig hair. . INDEX . FOSSILS . (brief, but widespread). HOW . MUCH PLATES HAVE . MOVED ALL OVER. . . . show how Earth went from . Pangeae. to how it is today in only 230 million years. 71 million years ago, India was down in the southern hemisphere.. In depth: chapter 19. Geologic Time Scale. Examining layers of sedimentary rock, scientists have put together a chronology of Earth’s history.. It is divided into 4 Eras:. 1. Precambrian (3.5 . bya. Organization of . Ch. 21-24. Ch. 21.1 – Describes the geologic time scale. Ch. 22 – Precambrian Earth. . Section 1: Early Earth. . Section 2: Formation of the Crust and Continents. . Section 3: Formation of the Atmosphere and Oceans. 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. Formation of the Sun, Planets and Earth (Notes 1). How our planet was structured during formation (Notes 2). Most recently we have discussed Earth’s history and the methods we use for putting together the story of our planet.. Draw an arrow pointing up on your graphic organizer like this. Paleozoic Era. Oldest. Youngest. Label it oldest to youngest. Fill in the major events that occurred in each period. Cambrian. Shallow seas cover most of the land.. Jacob Bleacher. Goddard Space Flight Center. 3. rd. Affordable Mars Workshop. Dec. 2, 2015. Geologic field work can be loosely defined as the body of work necessary to:. Determine the spatial distribution, age and attitude of the rock types within an area. Section 12.1 Discovering earth’s history. Uniformitarianism – the idea that physical, chemical, and biological laws that operate today also operated in the past; the present is the key to the past.. 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 4.6 billion years old. GEOLOGIC TIME.