Earth Revealed: Introductory Geology, originally titled Earth Revealed, is a 26-part video instructional series covering the processes and properties of the physical Earth, with particular attention given to the scientific theories underlying geological principles. The telecourse was produced by Intelecom and the Southern California Consortium, was funded by the Annenberg/CPB Project, and first aired on PBS in 1992 with the title Earth Revealed. All 26 episodes are hosted by Dr. James L. Sadd, professor of environmental science at Occidental College in Los Angeles, California.
Module II: Plate Tectonics: The Unifying Model (March 2, 1992-April 13, 1992)edit
3. "Earth's Interior" – The episode introduces geophysics, discussing how geophysicists study what lies beneath Earth's surface, using studies of seismic waves, variations in temperature, magnetic fields, gravity, and computer simulations to create models of structures deep in the earth. The episode also discusses paleomagnetism and the phenomenon of magnetic field reversals.
4. "The Sea Floor" – The episode explains how geologists study the sea bottom, using research submersibles and indirect methods, getting glimpses of volcanic activity; underwater formations such as the continental shelf, continental rise, slopes, canyons, abyssal plains, and mid-ocean ridges; and life forms that thrive at extreme depths in a world of intense pressure and total darkness. The episode examines subduction, seafloor spreading, hydrothermal vents, and the metallic resources found on the ocean bottom.
5. "The Birth of a Theory" – The episode examines the theory of plate tectonics and its development from its beginnings in the work of Alfred Wegener in the early 20th century through its maturation and acceptance in the 1960s. Topics covered include the prehistoric supercontinent Pangaea, continental drift, seafloor spreading, subduction trenches, paleomagnetism and magnetic field reversals, transform faults, and mantle convection.
7. "Mountain Building and the Growth of Continents" – The episode discusses the process of orogeny (mountain building) and the role plate tectonics play in it, cratons and their formation, the growth of continents through accretion, the erosion of mountains, isostasy, how different types of rock form in the course of orogeny, and how rock types change over time through the rock cycle.
9. "Earthquakes" – The episode discusses the forces that create earthquakes, explaining faults, seismic waves, the transfer of energy from an earthquake's epicenter, the method of determining an epicenter's exact location, how seismic waves affect different buildings differently, and the histories of the seismograph and Richter scale. It also describes devices under development in 1992 to study earthquakes with an eventual goal of predicting them.
Module III: Geologic Time and Life (April 20–27, 1992)edit
14. "Intrusive Igneous Rocks' – The episode examines the process in which magma seeps into crevices in existing rock and cools to form dikes of intrusive igneous rock without ever extruding onto the Earth's surface and how plate tectonics play a role in the process. It also discusses the formation and types of magma, xenoliths, batholiths, igneous differentiation, and how an understanding of igneous rock helps geologists understand the Earth's history. Geologists explain the types and textures of intrusive igneous rocks such as granite, obsidian, and quartz.
16. "Mass Wasting" – The episode explains the phenomenon of mass wasting — the downslope movement of earth under the influence of gravity. It discusses various factors involved in mass wasting, including the rock's effective strength and pore spaces, and different types of mass wasting such as creep, slump, and landslides, as well as rockslides, debris flows, and mudflows. It explains the influence of slope angle, water and rain, and human activities such as the construction of buildings and roads, on mass wasting. It also explains how engineering geologists assess slope stability.
17. "Sedimentary Rocks: The Key to Past Environments" – The episode describes how exposed layers of sedimentary rock allow scientists to discern the Earth's geologic past, the movement of sediment and its deposition and how energy affects both transportation and deposition of sediments, how weathering and erosion influence the composition of sediments, sorting, sedimentary beds and cross-bedding, and the production of sedimentary rocks through the processes of lithification, compaction, and cementation. It also discusses organic components and the economic importance of sedimentary rocks.
Module V: Carving the Landscape (June 22, 1992-July 27, 1992)edit
19. "Running Water: Erosion and Deposition" – The episode discusses how rivers play a vital role in the sculpting of land. It shows landscapes formed by rivers, the various types of rivers, the basic parts of a river, and how the characteristics of rivers — their slope, channel, and discharge — erode and build the surrounding terrain. The episode also covers river bars, meanders, cut banks, aspects of flooding including floodplains, and the evolution of rivers.
20. "Running Water: Landscape Evolution" – The episode explains how rivers carve such features in the landscape as canyons, discussing erosion and deposition processes as they relate to river characteristics and type of rock. It also discusses base levels, peneplains, stream terraces, incised meanders, river deltas, stream rejuvenation, the evolution of rivers, and efforts to prevent consequences of river flow that are harmful to humans, such as flood control efforts on the Mississippi River.
24. "Waves, Beaches and Coasts" – The episode discusses the dynamic interaction of rocky landmasses and the energy of the ocean, describing the types, parts, sources of energy, movement, and impact on the shore of waves. It also covers shoreline characteristics, refraction, currents, sea barriers, tides, tsunamis, how dams affect beach erosion, how the greenhouse effect could affect sea level and coastal lands, and the role of geologists in protecting the coastline.
Module VI: Living With Earth (August 3–10, 1992)edit
25. "Living With Earth: The Loma Prieta Earthquake" – The episode uses the 1989 Loma Prieta earthquake in California as the starting point for a discussion of how humans are learning to cope with earthquakes, methods of studying earthquakes, and how various groups and agencies are studying the San Andreas Fault and the damage caused along its path during the Loma Prieta earthquake to better understand how earthquakes affect the land, buildings, and people. It also discusses aftershocks, liquefaction, scientific concerns about the Hayward Fault, the cause of most human casualties during earthquakes, and what can be done to limit casualties and property damage in the event of an earthquake.
26. "Living With Earth: Preserving the Legacy" – The episode discusses the impact on the Earth of the Industrial Revolution, as well as where petroleum comes from, how it is discovered and extracted, and how it is converted into energy, and the effects on the Earth of oil drilling and the burning of fossil fuels. It also examines the potential of alternative energy sources, including the pros and cons of, and problems related to, the exploitation of geothermal energy.
Excerpt from Earth Revealed episode "Living With Earth: Preserving the Legacy" on YouTube
November 01, 2023
earth, revealed, introductory, geology, originally, titled, earth, revealed, part, video, instructional, series, covering, processes, properties, physical, earth, with, particular, attention, given, scientific, theories, underlying, geological, principles, tel. Earth Revealed Introductory Geology originally titled Earth Revealed is a 26 part video instructional series covering the processes and properties of the physical Earth with particular attention given to the scientific theories underlying geological principles The telecourse was produced by Intelecom and the Southern California Consortium was funded by the Annenberg CPB Project and first aired on PBS in 1992 with the title Earth Revealed All 26 episodes are hosted by Dr James L Sadd professor of environmental science at Occidental College in Los Angeles California Earth Revealed Introductory GeologyTitle cardGenreScience documentaryDirected byRobert LattanzioPresented byJames L SaddNarrated byDavid GilfillanComposerPeter DavisonCountry of originUnited StatesOriginal languageEnglishNo of episodes26ProductionExecutive producerSally V BeatyProducersRobert Lattanzio IntelecomRunning time30 minutesOriginal releaseNetworkPBSReleaseFebruary 1992 1992 02 August 1992 1992 08 Some footage used in Earth Revealed previously had been seen in the 1986 PBS series Planet Earth Contents 1 Episodes 1 1 Module I Introduction February 17 24 1992 1 2 Module II Plate Tectonics The Unifying Model March 2 1992 April 13 1992 1 3 Module III Geologic Time and Life April 20 27 1992 1 4 Module IV The Rock Cycle May 4 1992 June 15 1992 1 5 Module V Carving the Landscape June 22 1992 July 27 1992 1 6 Module VI Living With Earth August 3 10 1992 2 References 3 External linksEpisodes editModule I Introduction February 17 24 1992 edit 1 Down to Earth Beginning by comparing surface conditions on the planets Venus and Mars with the living landscapes of the Earth to highlight how unique the Earth is the episode describes the goal of the study of geology and introduces major topics the series addresses including the Earth s heat engines plate tectonics volcanism earthquakes and seismology erosion and natural resources such as groundwater 2 The Restless Planet The episode discusses the development of astronomical theory including the geocentrist views of astronomers in ancient Greece and the discoveries of Copernicus Galileo Galilei Johannes Kepler and Isaac Newton It also describes the formation of the Solar System and the physical evolution of the Earth over time including its internal structure through the process of planetary differentiation and development and retention of an internal heat engine its atmosphere its hydrosphere and the appearance of life Module II Plate Tectonics The Unifying Model March 2 1992 April 13 1992 edit 3 Earth s Interior The episode introduces geophysics discussing how geophysicists study what lies beneath Earth s surface using studies of seismic waves variations in temperature magnetic fields gravity and computer simulations to create models of structures deep in the earth The episode also discusses paleomagnetism and the phenomenon of magnetic field reversals 4 The Sea Floor The episode explains how geologists study the sea bottom using research submersibles and indirect methods getting glimpses of volcanic activity underwater formations such as the continental shelf continental rise slopes canyons abyssal plains and mid ocean ridges and life forms that thrive at extreme depths in a world of intense pressure and total darkness The episode examines subduction seafloor spreading hydrothermal vents and the metallic resources found on the ocean bottom 5 The Birth of a Theory The episode examines the theory of plate tectonics and its development from its beginnings in the work of Alfred Wegener in the early 20th century through its maturation and acceptance in the 1960s Topics covered include the prehistoric supercontinent Pangaea continental drift seafloor spreading subduction trenches paleomagnetism and magnetic field reversals transform faults and mantle convection 6 Plate Dynamics The episode examines the movement and interaction of tectonic plates and discusses the many geologic formations and phenomena that result from it including faults rift valleys convergent plate boundaries divergent plate boundaries volcanism subduction and hotspots It also discusses the lithosphere and asthenosphere and how they interact mantle plumes and the debate among geologists over what drives the motion of plates 7 Mountain Building and the Growth of Continents The episode discusses the process of orogeny mountain building and the role plate tectonics play in it cratons and their formation the growth of continents through accretion the erosion of mountains isostasy how different types of rock form in the course of orogeny and how rock types change over time through the rock cycle 8 Earth s Structures The episode explores rock layers outcrops and geologic cross sections sedimentation and sedimentary layering the principle of original horizontality major structures of rocks including fractures joints faults folds anticlines synclines and uncomformities and the methods used to study them It also examines tectonic force and the different types of stress involved in the formation of geologic structures and the deformation of rocks Finally it describes how geologic structures can trap petroleum natural gas and water and the resulting importance of the study of geologic structures in economic geology 9 Earthquakes The episode discusses the forces that create earthquakes explaining faults seismic waves the transfer of energy from an earthquake s epicenter the method of determining an epicenter s exact location how seismic waves affect different buildings differently and the histories of the seismograph and Richter scale It also describes devices under development in 1992 to study earthquakes with an eventual goal of predicting them Module III Geologic Time and Life April 20 27 1992 edit 10 Geologic Time The episode describes the immensity of geologic time the timeline of major geologic events in the Earth s history the relationship between the geologic timeline and the history of life on Earth and the use of fossils radiocarbon dating and uranium in radiometric dating to determine the age of rocks fossils and the Earth itself The episode highlights the contributions of James Hutton and Ernest Rutherford and discusses unconformities uniformitarianism the law of superposition the principle of original horizontality cross cutting relationships relative age dating and paleontology 11 Evolution Through Time The episode focuses on how the fossil record reveals the diversity and development of life on Earth examining the traces left by single celled prokaryotes and eukaryotes early plants animals and the progression of life forms over time through the Cambrian explosion and the Paleozoic Mesozoic and Cenozoic eras as well as the fossils found at the La Brea Tar Pits and the theory of evolution The episode discusses the connections between life on Earth and atmospheric gases climate change and the formation of rocks as well as biological functions mass extinctions and the effects humans have had on the biosphere Module IV The Rock Cycle May 4 1992 June 15 1992 edit 12 Minerals The Materials of Earth The episode examines the variety of minerals their atomic and crystalline structures and their physical properties such as color hardness luster cleavage and streak It also describes how petrologists section rocks and discusses hydrothermal solutions the precipitation of metallic minerals gems precious metals the formation and excavation of ores and the value of silicates 13 Volcanism The episode describes volcanic processes how tectonic plate boundaries are related to volcanism and how volcanoes provide geologists with clues as to what is happening within the Earth It also surveys the various types of volcanic eruptions craters cones and vents lava domes magma rift zones volcanic rock the relationship of volcanoes to ore deposits and geothermal energy and the clues that volcanologists use to predict eruptions 14 Intrusive Igneous Rocks The episode examines the process in which magma seeps into crevices in existing rock and cools to form dikes of intrusive igneous rock without ever extruding onto the Earth s surface and how plate tectonics play a role in the process It also discusses the formation and types of magma xenoliths batholiths igneous differentiation and how an understanding of igneous rock helps geologists understand the Earth s history Geologists explain the types and textures of intrusive igneous rocks such as granite obsidian and quartz 15 Weathering and Soils This episode shows how weather climate chemicals temperature and type of substrate play a role in rock erosion and the formation of soil It discusses mechanical and chemical weathering of rocks rock exfoliation and fracturing the acidification of rainwater and formation of acid rain soil horizons the Dust Bowl of the 1930s the effect of irrigation on soils windbreaks and the importance of soil as a natural resource It also shows how a soil conservation plan is developed and put into action at a farm in California s Mojave Desert 16 Mass Wasting The episode explains the phenomenon of mass wasting the downslope movement of earth under the influence of gravity It discusses various factors involved in mass wasting including the rock s effective strength and pore spaces and different types of mass wasting such as creep slump and landslides as well as rockslides debris flows and mudflows It explains the influence of slope angle water and rain and human activities such as the construction of buildings and roads on mass wasting It also explains how engineering geologists assess slope stability 17 Sedimentary Rocks The Key to Past Environments The episode describes how exposed layers of sedimentary rock allow scientists to discern the Earth s geologic past the movement of sediment and its deposition and how energy affects both transportation and deposition of sediments how weathering and erosion influence the composition of sediments sorting sedimentary beds and cross bedding and the production of sedimentary rocks through the processes of lithification compaction and cementation It also discusses organic components and the economic importance of sedimentary rocks 18 Metamorphic Rocks The episode describes how the weight of a mountain creates enough pressure to recrystallize rock thus creating metamorphic rocks It outlines the recrystallization process and the types of rock it can create including claystone slate schist and garnet bearing gneiss and it explains the relationship of metamorphic rock to plate tectonics It also discusses protoliths foliation migmatites contact metamorphism and regional metamorphism Module V Carving the Landscape June 22 1992 July 27 1992 edit 19 Running Water Erosion and Deposition The episode discusses how rivers play a vital role in the sculpting of land It shows landscapes formed by rivers the various types of rivers the basic parts of a river and how the characteristics of rivers their slope channel and discharge erode and build the surrounding terrain The episode also covers river bars meanders cut banks aspects of flooding including floodplains and the evolution of rivers 20 Running Water Landscape Evolution The episode explains how rivers carve such features in the landscape as canyons discussing erosion and deposition processes as they relate to river characteristics and type of rock It also discusses base levels peneplains stream terraces incised meanders river deltas stream rejuvenation the evolution of rivers and efforts to prevent consequences of river flow that are harmful to humans such as flood control efforts on the Mississippi River 21 Groundwater The episode focuses on how most fresh water comes from underground making groundwater an important natural resource It discusses aquifers and aquicludes rock porosity and permeability effluence artesian wells the water table the formation of caves stalactites and stalagmites sinkholes ways in which groundwater can become contaminated how groundwater is recharged naturally and the role of hydrogeology in groundwater management 22 Wind Dust and Deserts The episode shows how deserts are defined by infrequent precipitation where most deserts are located and how desertification relates to proximity to the equator proximity to mountains and ultimately plate tectonics It describes alluvial fans interior drainage patterns of deserts desert pavement and desert varnish examines how wind transports sand and creates dunes dry lakes blowouts and oases and addresses efforts to reduce desertification 23 Glaciers The episode discusses how glaciers shape the landscape explaining the formation structure and movement of glaciers and how they gouge and accumulate earth and rocks It also describes basal slip the snow line glacial striations till glacial landforms such as moraines and how the study of glaciers may help us understand ice ages and the greenhouse effect 24 Waves Beaches and Coasts The episode discusses the dynamic interaction of rocky landmasses and the energy of the ocean describing the types parts sources of energy movement and impact on the shore of waves It also covers shoreline characteristics refraction currents sea barriers tides tsunamis how dams affect beach erosion how the greenhouse effect could affect sea level and coastal lands and the role of geologists in protecting the coastline Module VI Living With Earth August 3 10 1992 edit 25 Living With Earth The Loma Prieta Earthquake The episode uses the 1989 Loma Prieta earthquake in California as the starting point for a discussion of how humans are learning to cope with earthquakes methods of studying earthquakes and how various groups and agencies are studying the San Andreas Fault and the damage caused along its path during the Loma Prieta earthquake to better understand how earthquakes affect the land buildings and people It also discusses aftershocks liquefaction scientific concerns about the Hayward Fault the cause of most human casualties during earthquakes and what can be done to limit casualties and property damage in the event of an earthquake 26 Living With Earth Preserving the Legacy The episode discusses the impact on the Earth of the Industrial Revolution as well as where petroleum comes from how it is discovered and extracted and how it is converted into energy and the effects on the Earth of oil drilling and the burning of fossil fuels It also examines the potential of alternative energy sources including the pros and cons of and problems related to the exploitation of geothermal energy References edit Resource Earth Revealed Annenberg Media PBS Adult Learning Service The Earth Revealed Introductory Geology PBS Archived from the original on 2004 12 12 GEOLOGY 100 Fundamentals of Geology Earth Revealed Series Index to Video Study Guides Mike Strickler Rogue Community College External links editEarth Revealed Introductory Geology at IMDb Excerpt from Earth Revealed episode Living With Earth Preserving the Legacy on YouTube Retrieved from https en wikipedia org w index php title Earth Revealed Introductory Geology amp oldid 1173652739, wikipedia, wiki, book, books, library,
