Yosemite Nature Notes: Ghost towns

January 13, 2015

Up on the Tioga Pass, Dana Village, Bennettville and the abandoned Golden Crown Mine tell part of the story of the 1890s gold rush in the Sierra Nevada.

Mining in California, okay. Mining at 11,000 feet in the Sierra Nevada, and staying there all winter?

Great history, geography, and explanation that every U.S. history student should know, about gold rushes, about boom towns, about mining entrepreneurs and investors, about failed enterprises and about the aftermath.

Published on Nov 19, 2014

Sitting on the crest of the Sierra Nevada, Tioga Pass is a gateway to Yosemite’s past. In 1880, a gold and silver rush erupted here, and miners flocked to Tioga Hill in droves.

Today, the ghosts of these miners work can be seen in the stone walls of Dana Village, rusty machinery at Bennettville, and the log cabins of the Golden Crown Mine. Even today’s popular Tioga Road was once a simple wagon road built to access the wealth of minerals that were never found.

It’s another great production by Steven Bumgardner, featuring two National Park Service rangers, Yenyen Chan and Greg Stock.

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Tioga Road.  Travelers who took this photo made the drive in a large RV -- so you can do it, too.  Photo from stillhowlynntravels

Tioga Road. Travelers who took this photo made the drive in a large RV — so you can do it, too. Photo from stillhowlyntravels

Map showing how to get to Tioga Pass in Yosemite National Park (at the eastern end of the red line).  Map from Undiscovered-Yosemite.com.

Map showing how to get to Tioga Pass in Yosemite National Park (at the eastern end of the red line). Map from Undiscovered-Yosemite.com.


Texas earthquakes, 2014

January 7, 2015

WFAA Channel 8 map of four quakes confirmed by 10:00 p.m. news casts, showing how close the quakes are in proximity to each other and the site of the old Cowboys Football Stadium.

WFAA Channel 8 map of four quakes confirmed by 10:00 p.m. news casts, showing how close the quakes are in proximity to each other and the site of the old Cowboys Football Stadium.

This Tweet from our local NBC TV affiliate sums it up nicely.

North Texas shook yesterday — not big quakes, but a bunch of ‘em — and that doesn’t sit well with Texas oil executives, since it seems likely gas and oil drilling, especially hydraulic fracturing (fracking), and especially waste-water reinjection seem to be causes.

I grew up in Utah.  We had quakes you could feel, at least weekly.  Our home sat less than a mile west of the Wasatch Fault.  Many mornings my mother would stand drinking her coffee, looking over the stove and out our kitchen window at Mt. Timpanogos, remarking on the earthquakes.  Most often we couldn’t feel them, but the power and telephone lines that slashed through our $10 million view of the mountain would dance in sine waves during quakes. It was pretty cool.

Along the more famous faults, one rarely comes on more than a couple of quakes a day.

Dallas — more accurately, Irving — is far away from most major faults, and rarely has more than a couple of quakes a year in recent human history.

So this swarm of quakes makes news!

WTVT Channel 11 (CBS) reported:

DALLAS (CBSDFW.COM/AP) – Nine earthquakes, three of them with a 3-point magnitude or greater, rocked North Texas Tuesday into early Wednesday, knocking items off walls, causing cracks to appear in ceilings and generally rattling nerves across the region.

“The last one really shook,” said CBS 11 anchor and reporter Ken Molestina, who felt the the earth move in the White Rock Lake area of Dallas.

The latest quake, reported just before 1 a.m. Wednesday, measured in at a 3.1 magnitude, and was centered near the convergence of State Highway 114, Loop 12, and the Airport Freeway near the old Texas Stadium site in Irving.

Others felt the temblor in the Uptown area of Dallas and as far away as Bedford and Mesquite.

Here’s a list of the quakes in order of when they happened:

7:37 a.m.                    2.3 magnitude

3:10 p.m.                    3.5 magnitude

6:52 p.m.                    3.6 magnitude

8:11 p.m.                    2.9 magnitude

8:12 p.m.                    2.7 magnitude

9:54 p.m.                    1.7 magnitude

10:05 p.m.                  2.4 magnitude

11:02 PM                   1.6 magnitude

12:59 AM                   3.1 magnitude

Rafael Abreu, a geophysicist with the USGS, spoke with NewsRadio 1080 KRLD and said while the Irving earthquakes happened only hours apart, given the strength and intensity, “we’re not calling it an aftershock.”

At last count Tuesday night, there had been 24 or more earthquakes in the Irving area since November 1, 2014.

Jokes fly, too.  Not this much shaking since Elvis toured the area heavily in 1957, some say.

Screen capture of USGS reports of four earthquakes in or near Irving, Texas, on January 6, 2014

Screen capture of USGS reports of four earthquakes in or near Irving, Texas, on January 6, 2014

Recent studies show earthquakes in other areas linked to oil and gas drilling and extraction.  All of these quakes are in close proximity to working wells or wells being drilled.

What’s the Earth trying to tell us?

Details from USGS on biggest quake, January 6, 2014

Details from USGS on biggest quake, January 6, 2014

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Historically, Texas has not been a hotbed of earthquake activity, between 1973 and 2012.  Texas Seismicity Map from USGS.

Texas Seismicity, 1973-2012. USGS


Devil’s Tower, Wyoming, and stars at night

January 5, 2015

Tweet from the Wilderness Society. Devil's Tower National Monument, in Wyoming, at night.

Tweet from the Wilderness Society. Devil’s Tower National Monument, in Wyoming, at night. Photo by Alex Weimer, from his flickr feed


Time lapse of latest eruption of Mexico’s Popocatépetl Volcano

December 30, 2014

It’s a 17-second video, a compilation of photos (over how much time?) showing the December 29, 2014 eruption of Popocatépetl.

Published on Dec 29, 2014

Eruptions are captured by webcamsdemexico, which is another indication that good, inexpensive electronic imaging devices change the way we study and experience natural events in the world today.

17 seconds of great drama. Are there other good images from this eruption?

Satellite photo of Popocatepetl, earlier. Image via CNN/Mexico

Satellite photo of Popocatepetl, earlier. Image via CNN/Mexico

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Glacier National Park, 104 years old and looking good

June 26, 2014

Department of Interior, May 18, 2014 -- Here's our most popular photo on social media last week celebrating @GlacierNPS 104th birthday. pic.twitter.com/JNaYYNnfcH

Department of Interior, May 18, 2014 — Here’s our most popular photo on social media last week celebrating @GlacierNPS 104th birthday. pic.twitter.com/JNaYYNnfcH

Glacier National Park marks its 104th year in 2014. Glacier offers views this spectacular every day of the year.


Moon and Mobius Arch, Alabama Hills, California

May 18, 2014

U.S. Department of Interior, Twitter feed: Beautiful view of the moon over Mabius Arch in the Alabama Hills Recreation Area. #California @BLMca pic.twitter.com/u0KYyJ6p0S

U.S. Department of Interior, Twitter feed: Beautiful view of the Moon over Mabius Mobius Arch in the Alabama Hills Recreation Area. #California @BLMca pic.twitter.com/u0KYyJ6p0S

Interesting points, reasons to like this image:

  1. No, that’s not the Sun.  It’s the Moon.
  2. Who knew California had natural arches?  I mean, it makes sense — but there’s one in Virginia, and a bunch of them at Arches National Park, and . . .
  3. An arch that should be in Utah, in the Alabama Hills, but not in Alabama, in California.
  4. Stars!
  5. Great photograph, obviously a long exposure.  Let’s see if we can find the name of the photographer.  Pox on Interior for failing to fit that into the caption. Photographer is Steve Perry, and you should check out his site (and buy some photos!). (Thanks, J. A. Higginbotham, for tracking that down.)
  6. America’s public lands, showing how they are unexcelled at astonishing us.
  7. What? Interior called the “Mabius Arch?” No, it’s the Mobius Arch!
  8. This place was named after the Confederate warship C.S.S. Alabama. Sympathetic miners making claims on minerals, it appears. “The unusual name Alabama Hills came about during the Civil War. In 1864 Southern sympathizers in Lone Pine discovered gold ‘in them thar hills.’ When they heard that a Confederate cruiser named the Alabama had burned, sunk or captured more than 60 Federal ships in less than two years they named their mining claims after the cruiser to celebrate. Before long the name applied to the whole area. Coincidentally, while Southerners were prospecting around Lone Pine, there were Union sympathizers 15 miles north near Independence. And when the Alabama was sunk off the coast of France by the U.S.S. Kearsarge in 1864, the Independence people struck back. They not only named their mining claims ‘Kearsarge’ but a mountain peak, a mountain pass, and a whole town as well.”
  9. More than 400 movies were shot using Alabama Hills for a backdrop, including How the West Was Won, Gunga Din (standing in for the hills of northern India) and the 1960 Audie Murphy classic, Hell Bent for Leather.
  10. Geologists will love that this area is a prime example of chemical erosion — rocks made out of the same stuff as the craggy Sierra Nevada Mountains in the distance, but eroded differently.
  11. Lichens by moonlight!  (Or is that just desert varnish?)

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Darwin’s death, April 19, 1882, and his legacy today

April 19, 2014

This is an encore post.

We shouldn’t pass April 19 — a day marked by significant historic events through the past couple hundred years — without remembering that it is also the anniversary of the death of Darwin.

Charles Darwin in 1881, by John Collier

Charles Darwin in 1881, portrait by John Collier; after a Collier painting hanging in the Royal Society

Immortality?  Regardless Darwin’s religious beliefs (I’ll argue he remained Christian, thank you, if you wish to argue), he achieved immortality solely on the strength of his brilliant work in science. Of course he’s best known for being the first to figure out that natural and sexual selection worked as tools to sculpt species over time, a theory whose announcement he shared with Alfred Russel Wallace, who independently arrived at almost exactly the same theory but without the deep evidentiary backup Darwin had amassed.

But had evolution turned out to be a bum theory, Darwin’s other works would have qualified him as one of the greatest scientists of all time, including:

Darwin's theory set out a sequence of coral re...

Darwin’s theory set out a sequence of coral reef formation around an extinct volcanic island, becoming an atoll as the island and ocean floor subsided. Courtesy of the U.S. Geological Survey (Photo credit: Wikipedia)

US Geological Survey graphic demonstrating how coral atolls form on the sinking remains of old volcanic sea mounts, as Darwin described. Wikimedia commons image

  • World’s greatest collector of biological samples:  During his five years’ voyage on HMS Beagle, Darwin collected the largest collection of diverse plant and animal life ever by one person (I believe the record still stands); solely on the strength of his providing actual examples to the British Museum of so much life in so many different ecosystems worldwide, before he was 30 Darwin won election to the Royal Society.  (His election was engineered partly by friends who wanted to make sure he stayed in science, and didn’t follow through on his earlier plan to become a preacher.)
  • Geology puzzle solver:  Coral atolls remained a great geological mystery.  Sampling showed coral foundations well below 50 feet deep, a usual limit for coral growth.  In some cased old, dead coral were hundreds of feet deep.  In the South Pacific, Darwin looked at a number of coral atolls, marvelous “islands” that form almost perfectly circular lagoons.  Inspired partly by Lyell’s new encyclopedic review of  world geology, Darwin realized that the atolls he saw were the peaks of volcanic mounts.  Darwin hypothesized that the volcanoes grew from the ocean floor to the surface, and then the islands were colonized by corals.  The round shape of the volcano gave the atoll its shape.  Then the volcanic mounts eroded back, or sank down, and corals continued to grow on the old foundations.  It was a perfectly workable, natural explanation for a long-standing geologic puzzle.  (See Darwin’s monograph, Structure and Distribution of Coral Reefs.)
  • Patient watcher of flowers:  Another great mystery, this time in biology, concerned how vines twined themselves onto other plants, rocks and structures.  Darwin’s genius in designing experiments shone here:  He put a vine in his study, and watched it.  Over several hours, he observed vine tendrils flailing around, until they latched on to something, and then the circular flailing motion wrapped the tendril around a stick or twig. Simple observation, but no one had ever attempted it before.  (See On the Movements and Habits of Climbing Plants.)
  • Champion of earthworms, and leaf mould:  Darwin suspected the high fertilizer value of “leaf mould” might be related to the action of earthworms.  Again, through well-designed experiments and simple observation, Darwin demonstrated that worms moved and aerated soil, and converted organic matter into even richer fertilizer. (See The Formation of Vegetable Moulds Through the Action of Worms.)
  • Creation of methodological science:  In all of this work, Darwin explained his processes for designing experiments, and controls, and made almost as many notes on how to observe things, as the observations themselves.  Probably more than any other single man, Darwin invented and demonstrated the use of a series of processes we now call “the scientific method.”  He invented modern science.

Any of those accomplishments would have been a career-capping work for a scientist.  Darwin’s mountains of work still form foundations of geology and biology, and are touchstones for genetics.

Born within a few hours of Abraham Lincoln on February 12, 1809, Darwin survived 17 years longer — 17 extremely productive years.  Ill through much of his life with mystery ailments, perhaps Chaga’s Disease, or perhaps some other odd parasite or virus he picked up on his world travels, Darwin succumbed to heart disease on April 19, 1882.

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