PPT-Fossils, Geologic Time, Absolute & Relative Dating, and Natural Resources

Fossils Geologic Time Absolute amp Relative Dating and Natural Resources Chapters 5 amp 6 How Do Fossils Form Fossils are found in sedimentary rocks like sandstone limestone and shale In Virginia most fossils are. Geologic Time Display. Description of Relative Dating. Refers . to the science of defining the relative sequence of past events, without . knowing . the relative . period. . The . order in which a series of events occurred, and when they have not occurred can be . 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).. Fossils found in SEDIMENTARY ROCKS. The lower the sediment layer is, the older the fossils of the layer will be.- Law of Superposition. As time elapses, more and more sediment layers form to create the layers of sedimentary rocks.. 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).. Fossils. Fossils provide a window into the past as they provide evidence about the changes that have occurred to the Earth over the 4.5 billion years of existence.. A . fossil . is the preserved evidence in rocs or soils of organisms that once existed on Earth.. Fossils. Fossils provide a window into the past as they provide evidence about the changes that have occurred to the Earth over the 4.5 billion years of existence.. A . fossil . is the preserved evidence in rocs or soils of organisms that once existed on Earth.. It has been suggested that, sometimes, drastic changes that can form a new species . take . place.. Under this idea, a new species may form after a group becomes separated from the original population.. Relative Dating. To . determine the relative age of different rocks, geologists start with the assumption that unless something has happened, in a sequence of sedimentary rock layers, the newer rock layers will be on top of older ones. This is called the Rule of Superposition.. Estimating age in the archaeological record is the primary focus of archaeological sciences. Being able to establish a timescale is what sets archaeologists apart from other disciplines. . However. , relative dating techniques are still fundamental to the discipline.. Chapter 10. Section 1- Fossils. Fossils are the preserved remains or traces of living things.. Fossils provide evidence of how life has changed over time. How Fossils Form. Most fossils form when living things die and are buried by sediments.. 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.. Geologic Time and Evolution Earth Has a History Geologic materials record enormous changes. Earth is a complex, evolving system. Physical and biological systems continuously interact. Earth constantly changes and has done so through 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 4.6 billion years old. GEOLOGIC TIME. Absolute vs. Relative . Age. Relative Age. Determining the age of an object in relation to other objects. “Estimate”. Index Fossils, Rock layers. Example. : A friend tells you . he . has 2 brothers – one that’s older than .