At each of the locations listed below, there is evidence of plate tectonic activity present at the Earth's surface. Salton Sea in California, USA Thingvellir (Þingvellir) National Park in Iceland Research the two locations and develop a PowerPoint presentation that could be used to teach tourists visiting each site about the geologic phenomenon contributing to what they see. Your submission must address the following: Your PowerPoint presentation should: Have a title slide. Contain at least 6 content slides (3 for each site). Reflect proper spelling and grammar. Cite at least 2 credible references and present the sources in APA format on a References slide. For each of the sites: Describe the type of plate tectonic activity that is occurring (i.e. boundary, movement, etc.) and include appropriate diagram(s) to help illustrate. Explain the evidence (events, landforms, and/or conditions) that supports tectonic activity is occurring.