Rising nearly 600 feet above the California Coastline is the towering monolith of Morro Rock. Often referred to as the "Gibraltar of the Pacific", this geologic oddity has been visited by humans for more than 10,000 years. But, how did it form, and how does it relate to a similar group of structures nearby known as the Nine Sisters? This video will answer these two questions through the perspective and analysis of a geologist. Thumbnail Photo Credit: This work "MorroRock1", is a derivative of a photo (resized, cropped, text overlay, GeologyHub made graphics (the image border & the GeologyHub logo)) from "Morro Rock", by: Person-with-No Name, JingKe888, jingke888s, 2021, Posted on Flickr, Flickr account link: https://www.flickr.com/photos/jingke888, Photo link: https://www.flickr.com/photos/jingke888/51163904135, CC BY 2.0. "MorroRock1" is used & licensed under CC BY 2.0 by Youtube.com/GeologyHub If you would like to support this channel, consider using one of the following links: (Patreon: http://patreon.com/geologyhub) (YouTube membership: https://www.youtube.com/channel/UCYeGh5VML5XPr5jYnzh3J6g/join) (Gemstone & Mineral Etsy store: http://prospectingarizona.etsy.com) (GeologyHub Merch Etsy store: http://geologyhub.etsy.com) Google Earth imagery used in this video: ©Google & Data Providers This video is protected under "fair use". If you see an image and/or video which is your own in this video, and/or think my discussion of a scientific paper (and/or discussion/mentioning of the data/information within a scientific paper) does not fall under the fair use doctrine, and wish for it to be censored or removed, contact me by email at [email protected] and I will make the necessary changes. Various licenses used in sections of this video (not the entire video, this video as a whole does not completely fall under one of these licenses) and/or in this video's thumbnail image (and this list does not include every license used in this video and/or thumbnail image): Public Domain: https://creativecommons.org/publicdomain/mark/1.0/ Sources/Citations: [1] U.S. Geological Survey [2] U.S. Geological Survey, California Geologic Map, https://mrdata.usgs.gov/geology/state/ 0:00 Morro Rock 1:01 Dacite Rock 1:35 Morro Rock Formation 2:27 The 9 Sisters 3:26 Mid Ocean Ridge