The table of geologic time spans presented here agrees with the nomenclature, dates and standard color codes set. The geologic time scale began when earth was formed and goes on until the present. Geologic time scale time units of the geologic time. Divisions of geologic time major chronostratigraphic and. Scientists developed the time scale by studying rock layers and fossils world wide. Paper timeline today, you will create a scale timeline of earths history on a long sheet of adding machine paper scale. Geologic time scale university of california museum of paleontology a geologic timescale not in linear proportion linked to summaries of each period. Can be specific about the time range they lived in.
Measuring time the geological time scale is a record of the life forms and geological events in earths history. The geologic time scale inb templates allow students to focus their notes on the geologic time eras. The development of the earth has taken place over a period of billions of years. A geologic time scale is composed of standard stratigraphic divisions based on rock sequences and is calibrated in years harland and others, 1982. It is used by geologists, paleontologists, and other earth scientists to describe the timing and relationships of events that have occurred during earths history. Kentucky geological survey 228 mmrb, university of kentucky lexington, kentucky 405060107 phone. The geological time scale is a system of chronological measurement that related stratigraphy the study of rock strata, especially the distribution, deposition and age of sedimentary rocks to time, and is used by the geologists, palentologists and other earth scientists to describe the. The goal of this lecture is come to come to a scientific understanding of geologic time and the. Geologic time scale vocabulary eon largest division of geologic time era broad spans of time based on the general type of life existing during that time zoic animal life paleozoic ancient life mesozoic middle lifedinosaurs cenozoic recent life. Read this article to learn about the geological time scale. Major divisions and subdivisions of geological time scale 3. Use the geologic time scale to the right to find the missing dates and fill in the blanks under the approximate age column in the data table below.
Geologic time scale a system of chronological dating that relates geologic land forms strata to time shows sequence of major evolutionary events plate motions and mountain building events can be placed on the geologic time scale geologists have divided earths history into. Jun 20, 2010 geologic time scale slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Geologic time scale time units of the geologic time scale development of eon era period epoch plants and animals phanerozoic proterozoic archean. The geological time scale was constructed using the evidences collected from a field observations b fossil records c stratigraphic correlations d.
If you continue browsing the site, you agree to the use of cookies on this website. Also available for download is the text that accompanies the image. The geologic time scale is a record of the major events and diversity of life forms present in earths history. The geological time scale gts is a system of chronological measurement that relates stratigraphy to time, and is used by geologists, paleontologists, and other earth scientists to describe the timing and relationships between events that have occurred throughout earths history. Gsa geologic time scale geological society of america. Be careful to mark down when that event began, not when it ended.
Geological time scale largest to smallest supereon. It is a worldwide scale developed by correlation of fossils from all around the world. Eon era period epoch date at boundary ma million years ago holocene neogene previously quaternary 0. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Students will also measure the relative ages of rock layers and identify gaps in the rock record. The geologic time scale notes polk county school district. The geologic time scale gts is a system of chronological dating that relates geological strata stratigraphy to time. Geologic time scale read earth science ck12 foundation. Over the years, the development of new dating methods and the refinement of previous. Faunal succession is a tool of stratigraphy and comprises the basis for the geologic time scale. It organizes earths history by major changes or events that occurred, using evidence from the fossil and geologic records. Thousands and millions of years are used on a geological time scale. The international commission on stratigraphy the home page of the people who maintain and continue to update the geologic timescale.
Radioactive dating like carbon dating helped determine the absolute divisions in the time scale. Geologic time scale slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Geologic time scale, principle of faunal succession, radiometric dating. All of the guesswork has been removed with this no prep lesson.
These materials are provided to assist in understanding time relationships and how life on earth changed through time. Instructor geologic time glg 101 physical geology rememberthe principle of uniformitarianism. This page uses frames, but your browser doesnt support them. The geologic time spiral is available for download in portable document format pdf. Geologic time how many years must pass before something can be measured using a geological time scale. The geological time scale is a system of chronological measurement that related stratigraphy the study of rock strata, especially the distribution, deposition and age of sedimentary rocks to time, and is used by the geologists, palentologists. Silurian ordovician cambrian collectively called precambrian comprises about 87% of the geological time scale holocene pleistocene pliocene miocene palaeocene oligocene eocene age of. Bishop usher in 1600 believed earth was formed on oct 23, 4004 bc, 9. The universe, star formation, the solar system and geologic time scale doc 9 mb pdf 3 mb pdf print friendly 3 mb pdf short 3 mb download ppt of pmfias youtube videos pmf ias youtube channel link geomorphology ppt 39 mb climatology ppt 98 mb climatic regions ppt 41 mb oceanography ppt 11 mb. Gy 111 lecture notes geological time lecture goals. The standard method used to divide earths long natural history into manageable parts. A system of chronological dating that relates geological strata to time and is used by geologists, paleontologists, and other earth. History records numerous attempts to determine the age of the earth. Combine related absolute techniques produce geologic time scale.
My grandparents were once my age are these measured as geologic time. Local time of any place is 12 noon when the sun is exactly overhead. Fossils and geologic time in this unit, we will learn about how fossil evidence show that earths surface, environment and climate have changed over time. During that time, life evolved into the familiar forms we see today. Each lesson plan follows the 5e model and provides you with the exact tools to teach the concept. It will vary from the greenwich time at the rate of four minutes for each degree of longitude. Ngss msess14 earths placegeologic time scale powerpoint. The time scale is divided into periods based on the order in which. Each inb activity is designed to help students compartmentalize information for a greater understanding of the concept. Discusses how major events in the evolution of life are divided into units and used by scientists to divide up the geologic time scale to refer to times in earth history. Moreover, as geologists discover more complete sections of rock, which preserve evidence of significant portions of geologic time, and as the international commission on stratigraphy evaluates and accepts the best worldwide examples of geologic events preserved in sections of rocks, the geologic time scale will be updated and refined. The geologic time scale is a representation of the earths history.
Geologic time scale a system of chronological dating that relates geologic land forms strata to time shows sequence of major evolutionary events plate motions and mountain building events can be placed on the geologic time scale geologists have divided earths history into time units based on the fossil record. Over the years, the development of new dating methods and the refinement of previous methods have stimulated revisions to geologic time scales. The dot scale of geologic time is adapted from an idea by charly zuppann of the indiana geological survey, bloomington, indiana the kentucky geological survey is a research and publicservice center of the university of kentucky. The table of geologic time spans, presented here, agree with the nomenclature, dates and standard color codes set. Describes how major events in the evolution of life are used to divide up the geologic time scale %. The geologic time scale is a record of the major events in the history of the earth. Geological time scale is a record of earths history based on the organisms that lived at different times. Defines geologic time scale, rock strata, superposition, relative age, absolute age, fossils, mass extinctions. The relative geologic time scale refer to the time scale at the end of these notes can construct a relative time scale based on fossils time rock units units with distinct fossil assemblages e. Geological time scale is a table showing the sequence of geological periods in the history of earth. Lecture notes 7 geologic time glendale community college. Unit 2, lesson 4 geologic time scale how do geologists use the geologic time scale.
Evolution demands more time in 1890s lord kelvin proposed 20400 my based on cooling of earth. The record of life forms and geologic events in earths history. The students will also be interacting with their journals using inb templates for the geologic time scale. Geological time is unlike normal time, at least the time that you and i am familiar with. Archbishop james ussher of armagh, ireland, 1654, added up generations from the old testament and determined that earth formed on october 23, 4004 bce. Geologic time scale geology and earth science news. Geologic timeearths history is divided into time units that make up a geologic time scale. Geologic time scale i created this history of the earth to show a whole bunch of cool stuff on one page. Time units on the scale are based on the appearance or disappearance of types of organisms such as trilobites, index fossils that lived during specific periods of time. Geologic time scale everything you need to teach a unit on the about the geologic time scale of earth. The geological time scale the ideas of superposition and evolution provide the basis of the geological time scale, which was developed in a somewhat random fashion mostly in europe during the 19th century.
B geological time divisions c geological time scale reference. By studying fossils, we have learned that life on this planet has undergone two major changes. Archbishop usher of ireland in 1664 argued that the earth was born on october 26, 4004 bc at 9. It also shows the lengths of time different geological periods are assumed to have occupied it is measured in millions of years. Oct 26, 2018 moreover, as geologists discover more complete sections of rock, which preserve evidence of significant portions of geologic time, and as the international commission on stratigraphy evaluates and accepts the best worldwide examples of geologic events preserved in sections of rocks, the geologic time scale will be updated and refined.
475 286 1057 892 1048 1466 1565 1092 978 279 1532 154 1049 282 1336 341 392 746 1086 1023 672 163 680 548 605 181 813 795 201 1084 945 792 354 684 594 296 631 936 1306 838 103