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29 Μαρ 2004 · Rocks on the seafloor on either side of a mid-ocean spreading ridge preserve a record of the Earth's magnetic field over time. The discovery of this phenomenon was an important bit of evidence that helped confirm the theory of plate tectonics. The interactive animation below illustrates this concept.
Southern California Hands-on Plate Model. puzzle packet including text and images for model construction Southern California History with Transverse Ranges Rotation, 20 Ma to Present.
14 Σεπ 2020 · Ocean ridges, transfers zones, and trenches (lines with teeth on the overriding plate) mark the surface expression of today's plate boundaries. We identify three types of plate boundaries. At divergent plate boundaries, typically ocean ridges, two plates move apart due to seafloor spreading.
28 Απρ 2020 · Students will learn how seafloor spreading happens, how drill samples provided evidence of spreading, and the lines of evidence that support plate tectonics theory. The lesson involves engaging students with an animation and video on seafloor spreading, think-pair-share discussions, and an activity using a seafloor spreading model.
Use the animate slider-bar to view the model as it transitions from position A to B. Instructional video; The current settings are saved in the link URL. Copy and paste to share. Examples: Pangea Model; Expanding Earth Model; Use this model to start from scratch. Seafloor Age Maps: Seismological Laboratory; NOAA; Earthquake Visualization ...
This animation of seafloor spreading and plate tectonic evolution of the planet since 200 million years ago is created from a synthesis of marine geophysical data (namely, the magnetic anomalies) and geological data on the continents.
Seafloor spreading is one of the two major processes of plate tectonics, the other being subduction. Seafloor spreading is the continuous process of forming new igneous rock at midocean ridges by injection of magma that forms new seafloor.
