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Written in Stone: Geologic clues build picture of Red Rock's past

Mr Roger K. Olsson | 22.07.2007 22:24 | Analysis | Other Press | World

Giuen Media



Friday, July 20, 2007


Jul. 20, 2007 (McClatchy-Tribune Regional News delivered by Newstex) --
There's a spot in Red Rock Canyon Open Space where you can see the direction the wind was blowing 280 million years ago.

'It's a spot that makes my heart pound. You look east from the top of Quarry Pass and see petrified sand dunes,' said Pikes Peak Community College geology professor Ken Weissenburger.

Rock helps explain almost everything in the 789-acre park. Time, ancient sea floors, dinosaurs, Ute warriors, and early city dwellers are all connected here by stone. But it takes an expert to really see the story.

Fortunately, the Friends of Red Rock Canyon is holding a free lecture series that delves into the park's geology, paleontology, history, native cultures and biology.

The lectures will act as a first draft for interpretive trails, displays and possibly podcasts the city parks department and the Friends plan to put together.

It will be helpful because the untrained visitor looking for that 280 millionyear-old wind at the top of Quarry Pass may look for another 280 million years and not notice anything.

Back in the Permian Period (290 million to 248 million years ago), Weissenburger said, Red Rock park was part of a coastal desert on the ancient supercontinent of Pangea. Dunes creeping across the windy plain moved in scale-shaped sloughs, pushed by wind. The dunes were eventually buried and became the red rock that is the park's namesake.

Erosion cut a cross-section of the old dunes. From Quarry Pass the diagonal lines of the old sloughs -- also called cross bedding -- are visible in the eroded rock. But, like many of the park's most interesting features, you have to know what to look for.

'If you spend any time here, you start to see how everything is connected,' said Don Ellis, a local historian who was strolling with the geologist.

There's a lot to learn from Red Rock Canyon. About 300 million years of geologic history was upended here by the rise of Pikes Peak. The distinct formations sit in a neat row, like books on a shelf.

They tell the story of millions of years of climate change, but they also, in some cases, preserve specific moments from eons ago.

On a rocky ridge in the eastern part of the park, a handful of footprints mark the moment when giant plant-eating dinosaurs wandered through the mud of a coastal forest. Fossilized fish bones in a powdery shale are the leftovers of a bigger fish's meal in a teeming shallow sea 70 million years ago.

'It's as if one page in a book was torn out, and left here for us to read,' said Weissenburger.

Life continues to leave marks in the stone.

Early European settlers found the prominent hogback of Dakota sandstone on the east side of the park dotted with small stone forts, probably used by the Utes as lookouts and defensive positions to guard the springs of Manitou from intruding plains tribes, according to 'The Indians of the Pike's Peak Region,' a 1914 book on the region by Irving Howbert.

'This was a natural gateway to the mountains,' said Ellis. 'The rocks made it a good place for defense.'

Along the stone rampart are scooped depressions called metates that the Utes wore smooth in the process of grinding something.

'Whether it was grains or acorns or ceremonial pigments from the nearby rocks, we don't know,' said Ellis.

Settlers in the 1860s found that the sandstone could easily be cleaved into blocks and carted away for use in building foundations.

'The whole ridge was quarried,' said Ellis. 'If you know what you're looking for, you can still see the wagon roads.'

The stone blocks are still around, too. Revelers at Eden Nite Club's foam parties, housed in an 1873 church, are dancing between walls built of 100 million-year-old beach sands where dinosaurs once tread.

Early residents also cut huge blocks of the red Lyons sandstone, which were carted out on trains. All the quarries were abandoned by 1912.

'The rock taken out ended up in several Denver mansions,' said Ellis.

On one little-seen quarry wall, there is a piece of history no one can explain.

The words 'Workers of the World' are chiseled with craftsmanlike expertise in the stone. They probably date from the 1920s, when a socialist workers movement known as the Industrial Workers of the World was at its height.

'But we don't know for sure where it comes from or who did it,' said Matt Mayberry, director of the Pioneers Museum. It's one of many things the city is trying to learn more about as it prepares an interpretive plan for the park.


LECTURE SERIES: All programs are 6:30-8:30 p.m. at the Pioneers Museum, 215 S. Tejon St.

JULY 26 -- Geology and Paleontology

Colorado Springs has more geologic time exposed in its rock layers than the Grand Canyon, and Red Rock Canyon is the best place to see much of it. Geologist Mark Izold will explain the ancient seas, swamps and sand dunes that created colorful formations and the mountain-building events that brought them to the surface.

Paleontologists Sharon Milito and Michael Poltenovage will show fossils preserved in the park, which, at various times, has been home to iguanodon and ankylosaur dinosaurs, and blunt-toothed shell-crushing sharks that feasted on giant clams.

AUG. 16 -- Archeology and Native Cultures

Thousands of years ago, native hunters tracked mammoths along the Front Range. Archaeologist Bill Arbogast will talk about these early hunters and their changing environment.

More recently, Manitou Springs was a gathering place and gateway to the mountains for several American Indian tribes. Red Rock Canyon was used as a defensive lookout and, possibly, a place to gather pigments for paint. Local author Celinda Kaelin outlines beliefs of area tribes and how they relate to the landscape.

OPEN-AIR VISION

Friends of Red Rock Canyon has drafted plans to turn the Bock house, a modernist stone house built by John Bock in 1967, into an outdoor classroom and pavilion. The group has a $50,000 challenge grant to raise money for the renovation. To find out how you can help, visit friends ofredrockcanyon.org.



Newstex ID: KRTB-0080-18296725


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Mr Roger K. Olsson
- e-mail: rogerkolsson@yahoo.co.uk
- Homepage: http://giuen.wordpress.com

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