Exploration and geology of Vermont’s newest longest cave, with 3300 feet of surveyed passage, located in the Taconic Mountain Range in Southern Vermont.
Since 2005 cavers have been returning to the Bob Marshall Wilderness in Montana to try and find the bottom of Tears of the Turtle Cave, currently the deepest limestone cave in the US. A tight, difficult, alpine fissure cave, Tears has so far resisted those efforts. This presentation covers the 2019 25‑person, 2‑week expedition. Come find out how deep they made it.
In 1960, cavers checked out a small cave on a ranch near San Antonio, Texas. Other cavers had been there before, but they pushed harder, and made the discovery of some of the largest, best decorated cave passages in Texas. A few years later it opened as a show cave and is well known and very popular. No new passages had been discovered in the cave since the late 1960s.
A special introduction to the gypsum karst landscapes of the Black Hills of South Dakota. This presentation highlights a recent set of trips into a couple gypsum sinkholes that were discovered when a neighborhood in Black Hawk, SD, started to fall into some rapidly forming karstic collapses. The presentation details the work of the Paha Sapa Grotto to explore and then map the sinkholes and caverns in this neighborhood.
Project cavers know, after years of mapping any cave system, it develops a life and mind of its own. A small group called Karst Terrain Explorations (KTE) has spent decades pushing the Roppel Cave–Logsdon River dive lead, following up on the ground work provided by our predecessors—our goal being to gather volumes of data and then systematically pass it forward to the next group involved.
Through most of 2019, as typical of recent years, Snowy River (SR) was flooded, preventing exploration due to closed sumps. By late summer it began drying out to produce a refreshed hard calcite floor and October was deemed the optimal time for exploration. A year earlier, a climb above SR had broken out into a new upper passage, Gold Rush. The first October 2019 expedition continued at one of the significant unexplored leads at Tetlin Junction.
It has been 40 years since the destruction of May 18, 1980. In the years since, a natural laboratory has sprung forth from the devastation and Mount St. Helens is now one of the most intensively studied volcanoes on Earth. Episodic unrest in the crater between 1980 and 1986 brought forth a new series of lava domes that grew to 350 meters tall. Another period of unrest started in September 2004, when a second lava-dome-building eruption initiated in the crater.