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Rock On, Mother Earth!

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by Bill Witherspoon, geology walks & talks guy

5.0(1 reviews)

4 episodes

Updated Weekly

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Podcast Overview

As you head to off-the-beaten-path national monuments, parks and other special sites, learn about Mother Earth’s rocks and landscapes from rangers, geoscientists, and visitors. We get the beat of the planet from her landscapes and rocks.

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🇺🇲

Publishing Since

2/15/2024

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Recent Episodes

July 16, 2024

Ep. 4- Petrified Forest, Pt. 2: Imagine A Former World

To experience the “forest” of Arizona’s Petrified Forest National Park, visitors must imagine a lush tropical former world from more than 200 million years ago. In the second of two episodes, we meet the forest’s creatures through the Rainbow Forest Museum’s exhibits and staff (Jessica Barnett and Garrett Stone). Ranger Barnett guides us to the park’s most famous log and its panoramic view. Then Professor Andrew Heckert charts the rise and fall of the park’s fauna over the course of the Triassic Period, which set the stage for the long reign of the dinosaurs.----more---- Podcast chapters (M= minutes, S= seconds) are summarized here: 00M 00S OPENING: I pick up the park journey with the drive from Blue Mesa to the Rainbow Forest Museum and Giant Logs Trail near the park’s south entrance. 01M 22S A SKULL TAKES SHAPE: Visitor Katie Bell and her children learn from paleontologist Ranger Jessica Barnett, as they help piece together a fossil skull. The skull belonged to a metoposaur, a salamander-like fish-eating amphibian that grew to several feet long. 07M 04S IMMERSED IN A DIORAMA: Intern Garrett Stone tours us through a room with murals and life-sized models of Triassic plants and animals. He contrasts phytosaurs that resemble today’s crocodiles with true crocodilians that stood on two legs. We see a phytosaur’s jaws around the slender neck of the early bipedal dinosaur, Coelophysis. 10M 27S Q&A WITH A RANGER: At a museum display, Ranger Jessica touts the advantageous joint flexibility shared by dinosaurs and their descendants, the birds. I also ask her how scientists determine the age of fossils. 15M 44S GIANT LOGS PANORAMA: Behind the museum on the Giant Logs Loop Trail, Ranger Barnett tells how rounded stream pebbles are evidence of a large enough river to have floated the giant logs. Atop the hill, we reach the park’s signature log, Old Faithful. Jessica describes the spectacular park panorama that extends to the Long Logs logjam and Agate House. 19M 03S GET READY FOR DINOSAURS: Professor Andrew Heckert discusses the fate of the park’s fauna, adding armored aetosaurs to the list already mentioned. He noted that anyone would have bet on the diverse “crocodile line” of the time. But conditions changed, and through adaptations never seen before, dinosaurs became the rulers of the remainder of the Mesozoic Era,. 29M 51S FOLLOW THE BROWN SIGN: Ranger Jessica Barnett extols the rich rewards of taking a few hours away from a journey along I-40, by following the brown sign directing you to Petrified Forest National Park. 31M 51S NEXT EPISODE, THANKS: I promise Episode 5 and thank participants.

July 9, 2024

Ep. 3- Petrified Forest, Pt. 1: Imagine Former Worlds

To experience the “forest” of Arizona’s Petrified Forest National Park, visitors must imagine a lush tropical former world from more than 200 million years ago. In this first of two episodes, paleontologist Andrew Heckert prepares us, revealing four former worlds along the route to the park from Gallup, New Mexico. Ranger Hallie Larsen welcomes us at the park visitor center by explaining how logs turned to stone. Professor Heckert then guides us through hoodoos and badlands along the park’s Blue Mesa Loop trail. ----more---- Podcast chapters (M= minutes, S= seconds) are summarized here: 00M 00S OPENING: I compare descending through rock layers to visiting former worlds and explain that the road from Gallup to the park is like an elevator ride into the past. 02M 26S GALLUP, LOUISIANA?: Dr. Heckert and I discuss coal-bearing layers of the Mesa Verde Group in a road cut at the edge of Gallup. He compares its former world, populated by crocodilians, scaly garfish, and horned dinosaurs, to the swamps of today’s Louisiana. 07M 36S SEAWAY & RATTLESNAKES: Outcrops seen from I-40 record the Interior Seaway that divided North America during much of the Cretaceous Period. The Mancos Shale near milepost 13 reveals offshore environments that varied over time with relative sea level. Visible near milepost 5, the Dakota Sandstone blanketed the West with river deposits as the seaway began to flood a deeply eroded landscape. 14M 38S TATOOINE AT YELLOWHORSE: At Yellowhorse Trading Post and the nearby Arizona Welcome Center, we step out of the car to gaze up at the remnants of migrating dune fields. Andy compares the Entrada Sandstone deposits to the Tunisian landscape that stood in for the desert planet Tatooine in Star Wars movies. 19M 21S LOGS TURN TO STONE: Ranger Hallie Larsen welcomes us to the park’s Painted Desert Visitor Center by explaining how giant logs in great rivers formed jams, were buried, and turned to stone. Some wood, with incomplete petrification, is less colorful but preserves cell structure. 26M 36S BLUE MESA BADLANDS: Professor Heckert looks through the images I took hiking the one-mile Blue Mesa Loop Trail, discussing hoodoos and shrink-swell clays that are a nightmare when wet. We see a petrified log that he says most likely has been “let down.” 32M 40S A CLIFF’S STORY: Andy interprets sediment layers (see podcast image) that alternate between rivers dropping sand and gravel with floodplains hosting plant roots. 39M 18S NEXT EPISODE, THANKS: I preview Episode 4 and thank participants.

February 18, 2024

Ep. 1- Capulin Volcano: How Tall Is Your Imagination?

New Mexico’s Capulin Volcano National Monument features a drive-up vista into four states across a volcanic landscape, as well as trail access to the crater and lava flows. Its landscape and rocks tell a story of the power of Earth forces that expands the imagination. Meet interpretative ranger Geoff Goins and volcanologist Matt Zimmerer, to learn how less than a decade of eruptions may have built a mountain, and where New Mexico’s next eruption might take place. ----more---- Podcast chapters (M= minutes, S= seconds) are summarized here: 0M 0S OPENING: Capulin’s volcano, its views, and its lava flow trail are the attractions. Join me for a walk with a ranger (Geoff Goins) and a chat with an expert on New Mexico’s volcanoes (Matt Zimmerer). 0M 50S IMAGINATION: Ranger Goins invites us to imagine Capulin’s formation. Jerry from Palmer Lake, Colorado and I talk in the crater about the eruption. Our imagination falls short of Geoff’s description of a cinder cone type of eruption. 5M 5S APPROACH: Ranger Goins and I discuss the Raton-Clayton Volcanic Field as seen along the drive to Capulin, for those arriving from Texas. 7M 59S TRIP TO SUMMIT: Volcanologist Dr. Zimmerer answers my questions about a roadcut view of the cinder cone. I ask him to account for the presence of, not just tiny cinders, but lava boulders in the crater. 17M 56S LAVA FLOW TRAIL: I walk a trail from the visitor center with Ranger Goins. He explains how Capulin became vegetated, and helps listeners imagine the sights and sounds of the lava flows during eruptions. 26M 18S VIEW FROM CAPULIN: Dr. Zimmerer explains the geology seen in the vistas from the rim trail. On the western horizon, the southern Rockies reach higher than 13,000 feet, capped with 300-million-year-old limestone, plus other rocks 1/3 as old as Earth. The northeast view includes flows from Capulin’s eruption 54,000 years ago and still younger volcanoes, one nearly quarried away for cinders that make icy roads passable. In the far distance, one Raton-Clayton lava flow reached Oklahoma, where it makes that state’s highest point. 38M 47S TO BUILD A MOUNTAIN: I put the swiftness of Capulin’s construction into context, by sketching out the 300 million-year-long evolution of similar-sized Stone Mountain, Georgia. Ranger Goins tells the story of Paricutin, a Mexican cinder cone that began in a cornfield and grew to twice Capulin’s height in less than a decade. 44M 40S FUTURE ERUPTIONS: Dr. Zimmerer shares his research on where and when New Mexico could experience its next volcanic eruption. I ask him why New Mexico is volcanically active compared to my home territory in the East. We hear about the Rio Grande Rift, the Jemez Lineament, and the magma pool 17 miles beneath Matt’s office at New Mexico Tech in Socorro. 53M 7S NEXT EPISODE: I close by promising Episode 2 and thanking participants. SOURCES: <a href='https://www.nps.gov/cavo'>HTTPS://WWW.NPS.GOV/CAVO</a> ; <a href='https://nmgs.nmt.edu/publications/guidebooks/70/'>HTTPS://NMGS.NMT.EDU/PUBLICATIONS/GUIDEBOOKS/70/</a> ; <a href='https://www.sapiens.org/archaeology/folsom-point-archaeology-icon/'>HTTPS://WWW.SAPIENS.ORG/ARCHAEOLOGY/FOLSOM-POINT-ARCHAEOLOGY-ICON/</a>

4 total episodes available

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Frequently asked questions

Have a different question and can't find the answer you're looking for? Reach out to our support team by sending us an email and we'll get back to you as soon as we can.

What is Rock On, Mother Earth!?: As you head to off-the-beaten-path national monuments, parks and other special sites, learn about Mother Earth’s rocks and landscapes from rangers, geoscientists, and visitors. We get the beat of the planet from her landscapes and rocks.
How often does this podcast release new episodes?: This podcast updates weekly.
Where can I listen to this podcast?: This podcast is available on 7 platforms including Apple Podcasts, Spotify, and more. You can also use the RSS feed directly.
Does this podcast accept guests?: Yes, this podcast regularly features guests.

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