David Schwartz@dsgeology

Department Chair Geology, Oceanography & Environmental Science at Cabrillo College

http://www.cabrillo.edu/~dschwartz/

76 posts 114 followers 67 following

This rock is called “Plastiglomerate”, it’s from Kamilo Point, Hawaii Island. It consists of sand from young extrusive volcanic rocks called basalt that are rich in iron and magnesium silicate minerals, as well as plastic debris. When people have campfires on beaches near Kamilo, some plastic debris will fully melt, and some will only partially melt. The melted plastic, along with a natural calcium carbonate cement turns the sand and plastic into a new rock, never seen before on our planet until the arrival of humans. #plasticdebris #cleanoceansinternational #clean #cleanbeaches #lovenature #geology #basalt #nolittering #rarerocks #igneousrock


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My wife and I are taking care of “Butch”. Making it legal to hunt and kill elephants for sport and trophies is wrong. These are beautiful, intelligent, amazing animals. Let’s fight to protect all animals; our children are counting on us. #lovewildlife #protectelephants #africa #africanelephant #animalrights #notrophyhunting #savewildlife #love #bekindtoelephants


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The perfect combination, a margarita made with Cazadores sitting on a countertop made with phaneritic gabbro rich in calcic plagioclase, some amphiboles, pyroxenes and a little olivine. #geology #kitchencountertops #rockstyle #igneous #margaritas #countertops #rocks #geologylife


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The 39th Coastal Cleanup! 11/4/17. #CabrilloCollege Oceanography & Environmental Science students were at it again. 60 participants removed 840 pounds of trash in less than 3 hours. Thank you students and friends. Let’s fight for a Cleaner Ocean. #beaches #cleanoceans #ocean #marinedebris #plasticocean #cleanenvironment #beachcleanup #saveourshores


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Maps, rocks & some music. Cabrillo College Geology 10 students studied topographic maps, sedimentary & metamorphic rocks in our Friday lab. Fun times. #geology #rockstyle #minerals #maps #ramones #music #cabrillocollege


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Cabrillo College Oceanography and Environmental Science students will be hosting our 39th Coastal Cleanup on Saturday November 4th at KSCO Radio Station on Portola Drive from 9am - 12:30 pm. Breakfast, Lunch, gloves, bags and live music all provided for Free! Please join us. Let’s fight for a cleaner environment. #cleanoceans #cleanoceansinternational #cabrillocollege #marinedebris #cleanbeaches #nolittering #oceanography #outdoors


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Today I showed the Oceanography students a movie called “Fire Under the Sea; the Origin of Pillow Lava” using a 16 mm projector. Great movie. Old school. #pillowlava #hawaii #scubadiving #16mmprojector #70s #explosions


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This is what the Geology 27 students were looking for! Approximately 23.5 million yrs ago, young felsic magma worked its way up through much older granitic "country rock" and violently blasted coarse grain pyroclastic fragments into the air creating the Pinnacles Volcanic Formation. Along with that young Cenozoic magma, some of the older Mesozoic granitic host rock was also blasted into the atmosphere. Sometimes the older "foreign" country rock encased in younger volcanic rock is referred to as "Accidental Ejecta". The third photo shows another young pumice lapilli tuff from the Pinnacles Volcanic Formation with an old granitic accidental ejecta fragment. #cabrillocollege #volcano #volcanic #igneous #platetectonics #outdoors #loverocks


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Good morning Santa Cruz. Another day to teach, & think about geology, oceanography, and environmental science. Cabrillo College students are awesome, I'm lucky to be a part of it. #cleanoceansinternational #earth #cabrillogeology #planetearth #plasticocean #marinedebris #outdoors #oceanography


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The students in the fall 2017 Geology 27 class at the Pinnacles National Park were awesome! We got a lot of work done, and had a good time doing it. Thank you everyone! #outdoors #cabrillocollege #pinnaclesnationalpark #collegelife #geology #volcanoes #sanandreasfault


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Alvin and Vera with Clean Oceans International staff after a recent meeting at the World Head Quarters adjacent to the Santa Cruz Harbor. #outdoors #cleanoceansinternational #saveourshores #beachcleanup #plasticocean


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Not really, but that Ammonite behind the sticker sure is. Our Geology 20 students studied and saw so many Cretaceous rocks (144-66 million yrs) in the spring semester 2017, the phrase became contagious. One of my students drew this design for me. Notice the record, the rock hammer, the guitar and the mountains. All things that are near and dear to me. Thank you Katrina and Geology 20 students; you rock! #fossils #ammonites #geology #outdoors #mountains #cabrillo #guitars #rockhammer


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The summer beach profile is back. This picture was taken in late August just east of 26 Ave stairs, looking east toward Moran Lake Beach. Oceanography students at Cabrillo College have been surveying these beaches since 1988. The high wide berm and steep beach face will eventually evolve into a low lying gently sloping foreshore, as a result of erosion from high energy winter waves, coming soon to Santa Cruz. #beach #seasons #oceanography #cabrillocollege #waves #survey #surf #storm #cycles #erosion


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My fountain with two beautiful striped calc-silicate Hornfels of Horse Creek. They are Triassic in age (251-208) and are rich in epidote and plagioclase. They likely formed when volcanoes erupted on an island arc and the ash settled into freshwater lakes. The mixed sediment lithified, and the island arcs eventually docked onto California. Millions of years later the rocks were uplifted, exposed and moved down Lundy Creek, deposited near Mono Lake for all of us to enjoy! #epidote #metamorphic #rockcycle #lundycanyon #basinandrange #leevining #platetectonics


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Cabrillo College Geology & Oceanography Student Assistants have been awesome over the years. They are talented, dedicated and knowledgeable. Thank you Greg, Hollianne, Patti, Eliot, Cassie, Stephanie, John, Travis, Galen, Porter, Ethan, Susan and many more! Our program is, and has been stronger because of your hard work. #college #studentassistant #fieldtrips #fieldwork #handson #cabrillocollege #geology #oceanography


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Grad school days, early 1980's. My close friend Rich Rasch (7/13/55 - 8/16/2008) with me after a days work at Moss Landing Marine Labs. Rich's thesis covered the origin and distribution of phosphorites along the central California outer continental margin. He was a talented researcher, but ended up having another successful career for over 20 years as a general contractor in Cleveland Ohio. Love you Rich. Miss you. #geology #the80s #cleveland #rememberwhen #oceanography #graduateschool


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We visited Edgewater Park, west side Cleveland Ohio. Some of the sand is natural, rich in silicates and shell fragments. Some of the Sand is imported. Warm, clean fresh water; Lake Erie temperature 75 degrees, air temperature 85 degrees. Very nice! #beachsand #greatlakes #lakeerie #cleveland #ohio


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Cabrillo College Geology 20 students are working at Taft Point, south rim of Yosemite Valley, at 7503 feet above sea level. A few hundred feet away is Yosemite Valley floor, at 4,000ft. Field trips are great, student learning is very effective when we are outside. Fun! Nice work summer 2017 class! #cabrillocollege #geologyrocks #granite #yosemite


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Geology 20 students high above Yosemite Valley on top of Sentinel Dome, taken by superstar Student Assistant Holliane McClure. There was some haze from the fires, but the views were still beautiful, and we had a blast! Thank you Geo 20 class! #yosemite #sentineldome #taftpoint #glacierpoint #tuolumnemeadows #monolake


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5 million year old sandstone from the Pliocene Purisima Formation. We cracked the rock open and found those beautiful calcite crystals. Surprise! Santa Cruz County is lucky to be built on such an amazing formation. #minerals #calcite #crystals #fossils #geology #santacruz


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The fog eventually lifted. Thousands came to honor Jack O'Neill. Thank you Jack. #surfing #surfer #pleasurepoint #oceanfun #oneillseaodyssey #wetsuits


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This man is climbing the Monolith at the Pinnacles National Park, located in the central Coast Range of California. The monolith is a volcanic clast, a transported fragment of the earths crust. The monolith fell into a steep river cut gorge millions of years ago and has become part of the talus caves found in the upper Bear Gulch Canyon. The Monolith is composed of Rhyolite Breccia, a volcanic rock that formed 23.5 million years ago ~314 Km to the south. #pinnaclesnationalpark #geology #cabrillocollege #sanandreasfault #outdoorfun #rockclimbing


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My son Daniel and Corinne were married on Saturday July 1st. Incredible friends and family came from all over to witness and celebrate. These two guests are working on their PhD's in Geochemistry at Scripps Institute of Oceanography at the University of California San Diego. Congratulations, & go Geology! #ucsd #scrippsinstituteofoceanography #geochemistry #wedding #benlomond


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Historical Geology 20 students study the oldest rocks in the Sierra Nevada, banded radiolarian chert ~320 – 350 million years old exposed in the northwest Sierra about 10 miles outside Yosemite National Park, along Highway 140. The steep “Chevron Folds” result from tectonic collisions and docking events that occurred in western North America in the later Paleozoic, and throughout the Mesozoic Era. Come study the Yosemite region with Cabrillo College Geology – fun! #geology #sierranevada #outdoorfun #camping #tuolumnemeadows #leevining


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Another great day with Jack O'Neill and my friend Nicole Crane at the Santa Cruz Harbor in the '90's. Thank you Jack. #surfing #harbors #oneillseaodyssey #oceanography #cabrillocollege #geofun #marinebiology


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New growth, new summer, new opportunities. Coast Redwoods can grow three to ten feet per year, depending on conditions. They are among the fastest-growing trees on earth. Cabrillo College Environmental Science students often spend a few sessions studying their history and ecology. #santacruzmountains #coastalredwoods #summer #bigtrees #forest #protecttheearth


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The world’s oceans are in trouble. In January 2017, staff members and students from #CleanOceansInternational
went to #Cuba to survey trash on local beaches and raise awareness about plastic debris in the world’s oceans. We made contacts for future work and found Cubans to be very warm, hospitable and welcoming. Let’s all pitch in to help raise awareness of this global problem. Let’s stop plastics and trash from entering the world’s oceans we care so much about. #havanacuba #greatgarbagepatch #marinedebris #aplasticocean #microplastics


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Thank you Jack O’Neill (3/27/23 – 6/2/17). He is mostly known as a business man, wet suit & surfing pioneer, but Jack O’Neill also cared deeply about the marine environment and in 1996, founded The O’Neill Sea Odyssey. The O'Neill Sea Odyssey program provides a hands-on educational experience to encourage the protection and preservation of the world’s oceans, focusing on marine science, marine and watershed ecology, and marine navigation. Over 100,000 students, mostly 4th – 6th graders have gone out to sea on the O’Neill Catamaran to experience and study the ocean environment. Cabrillo College Oceanography students also participated with the program for ~8 years and have always been proud to be part of this extremely worthwhile and ambitious program. http://oneillseaodyssey.org/ #oneillseaodyssey #oneillwetsuits #marineecology #protecttheoceans #jackoneill #surfing #oceanography #wetsuits


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Let's celebrate the amazing silicon oxygen tetrahedra, the building block of the earths crust and mantle. It's an incredible ion with so many possibilities. Many geologists like me think about them all the time. It can occur as a single tetrahedron or double isolated, or as single and double chains, rings, sheets and complex 3 dimensional structures. Most people don't think about the ion, but we're never very far from millions of them. #siliconoxygentetrahedra #silicates #geology #tetrahedron #molecules #earthcrust #elements


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Alvin loves the beach, and one of his favorite things to do is chase his tail on the sand. The beach sand in Santa Cruz California consists of variable amounts of quartz, orthoclase, plagioclase, biotite, hornblende, clay minerals, chert, volcanic and granitic clasts, shell fragments and more. All are typical components of the local bedrock in the Santa Cruz Mountains and part of the northern Monterey Bay coastal circulation cell. For more on the geology of Santa Cruz and the Monterey Bay region, enroll in Geology 10 or 20 @ Cabrillo College. Fun! #dogs #sand #mineralogy #physicalgeology #historicalgeology


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