Showing posts with label Ancient Rivers. Show all posts
Showing posts with label Ancient Rivers. Show all posts

Thursday, February 14, 2008

North California Gold Map

Maps

NORTH CAROLINA Gold Map- 300 gold sites - A 17 pound gold nugget was found by a 12 year old boy, Conrad Reed, in 1799 in a creek. It was used as a doorstop for three years. You will enjoy visiting the Reed Gold Mine, the nation’s first, at Stanfield. It has gold displays, equipment, a film, gold panning and tours of the gold mine (704-786-8337). Also, see the NC Minerals Museum at Spruce Pine and the Colburn Gem and Mineral Museum at Asheville. National forests. Beautiful streams. Other North Carolina gold nuggets: 28 pounds, 25 pounds and 15 pounds.

ALABAMA Gold Map- 140 gold mines and prospects - Montgomery, Birmingham, Anniston, Auburn. A geological report states: “The Hilton Brothers reopened the pit. They succeeded in obtaining 65 ounces of gold from a hole 3 feet by 2 feet by 20 inches; the result of half a day’s work.”

SOUTH CAROLINA Gold Map- 130 gold sites - There are several operating gold mines in South Carolina. The Ridgeway Gold Mine has been predicted to become one of the largest primary gold mines in North America. Gold mines and prospects near Greenville, Spartanburg, Clemson, McCormick, Newberry, Greenwood, Camden, York, Rock Hill, Lancaster and Pageland.

GEORGIA Gold Map- 500 gold sites - 500 gold mines and prospects in 37 counties extend from south of Atlanta to Tennessee, North Carolina, South Carolina & Alabama. Georgia is a wonderful state for gold prospecting, gold panning, treasure hunting and rockhounding. There was a major gold rush in 1828 at Dahlonega. Vice President John C. Calhoun mined at Auraria. Villa Rica, west of Atlanta, is known as “The Golden City”. Visit Dahlonega’s gold museum with displays, film & lectures (706-864-2257). The Crisson Gold Mine and the Consolidated Gold Mine at Dahlonega are open to visitors and gold panning may be done at these mines.


VIRGINIA Gold Map - Virginia has a long history of placer gold and lode gold production. There are 200 gold mines and prospects in 15 counties shown on the Virginia Gold Map. Panners from other states go to the Virginia gold sites and pan for the yellow metal.

The Ancient Rivers

ANCIENT MAGALIA CHANNEL

Magalia Channel is just north of Paradise, Butte County and gold sites are on both sides of the channel. A 54 pound nugget was found at Magalia. The West Branch of Feather River runs near and crosses this ancient channel south of Last Chance Creek.

ANCIENT JURA RIVER

The Ancient Jura River is from the Jurassic Period, which makes it much older than the ancient rivers of the Tertiary Period. The course of this ancient river traces from Sierra County past Blairsden and Cromberg in Plumas County and Mount Ingalls. There are very few gold sites along the Jura River.

MOKELUMNE ANCIENT RIVER OF GOLD

Tertiary Mokelumne River starts in Eldorado National Forest and runs westward. It terminates about 8 miles west of California State Highway 49 not far from the town of Plymouth in Amador County. Two branches of the river originate near the North Fork of the Cosumnes River. Quite a few gold sites occur along the westernmost branch and along the main course of the ancient river near the towns of Volcano and Plymouth.

CALAVERAS ANCIENT RIVER OF GOLD

A considerable number of gold sites parallel the Tertiary Calaveras River. Tertiary Calaveras itself parallels the South Fork of the Stanislaus River just north of Columbia Historical State Park. The ancient river continues westward to California State Highway 49 and parallels the gold camps north to San Andreas. It terminates near Valley Springs in Calaveras County.

Rich gold deposits occur near the branches of ancient Calaveras. Hundreds of gold sites appear on Gold Map 5 along and between the two northern branches that originate near the towns of Sutter Creek and West Point.

TUOLUMNE ANCIENT RIVER OF GOLD

Tertiary Tuolumne River parallels the present-day Tuolumne River from Oakland Recreation Camp in the Stanislaus National Forest to Chinese Camp by Highway 49. There are many gold sites both north and south of this ancient river and near the towns of Coulterville, Jacksonville, Jamestown and Tuolumne.

ANCIENT INTERVOLCANIC CATARACT CHANNEL

The ancient Intervolcanic Cataract Channel originates in Calaveras Big Trees National Forest in Tuolumne County. It crosses the North Fork of the Stanislaus River into Calaveras County. It then crosses the Stanislaus River near Carson Hill, Columbia State Park and Squabbletown. The channel continues in a southwesterly direction a few miles west of Sonora and Jamestown and terminates at the Tuolumne/Stanislaus County line. A considerable number of gold deposit sites exist at each of the aforementioned towns.

The Ancient Rivers

YUBA ANCIENT RIVER OF GOLD

This ancient river of gold is by far the largest of the Tertiary rivers of the Sierra Nevada of California. It will be seen on Big Ten’s California Gold Map 5 that the Tertiary Yubu runs through or into the counties of Plumas, Sierra, Yuba, Nevada, Placer and El Dorado.

Ancient Yuba has numerous branches wandering throughout the area between Marysville and Lake Tahoe. The general drainage is from east to west; but in some of the branches the flow was from south to north and in other branches it was from north to south.

The Ancient Yuba River has been a rich source of gold. The famous gold towns of Grass Valley and Nevada City are along the course of the Ancient Yuba, as are the numerous gold deposit sites south of Downieville in Tahoe National Forest.

The deepest trough-shaped depressions in the drainage basin of the Tertiary Yuba River are usually filled to a depth of 50 to 200 feet by coarse gravels which ordinarily have been cemented so that they cannot be washed without crushing. Bench gravels

cover the deep gravels and in some places the bench gravels spread out to a width of one to two miles. The bench gravels contain much quartz. The pebbles are smaller than the deep gravels and always, except close to the headwaters, well rounded and polished. Fossil leaves have been found in the bench gravels.

The courses of the present-day Yuba River, including it’s North Fork, Middle Fork, South Fork and the smaller tributaries that feed them are also shown on Gold Map 5.

AMERICAN ANCIENT RIVER OF GOLD

The Tertiary American River follows a more or less east to west course from south of Lake Tahoe to the town of Roseville northeast of Sacramento and Carmichael. It crosses California State Highway 49 a couple of miles south of gold-rich Placerville.

ANCIENT INTERVOLCANIC AMERICAN RIVER

The Ancient Intervolcanic American River has many gold deposit sites along it’s course. It starts in Tahoe National Forest near the North fork of the present-day American river, then winds it’s way southwesterly to Auburn, Placer County. Many gold sites are near Auburn. One branch of the Ancient Intervolcanic American River circles around Volcanoville, which is noted for it’s gold.

The Ancient Rivers of Gold

The Ancient American River, Ancient Yuba River, Ancient Calaveras River, Ancient Mokelumne River, Ancient Tuolumne River, Ancient Magalia Channel, Ancient Intervolcanic Cateract Channel, Ancient Intervolcanic American River and the Ancient Jura River (from the Jurassic Period), are plotted in detail on Big Ten’s California Gold Map 5. The present-day rivers bearing the same names as their ancient rivers are also shown.

The Ancient Rivers of Gold in northern California are from the Tertiary Period. The Tertiary rivers existed millions of years ago and many of them had large quantities of gold within their gravels. Because of that, they are known as the "Ancient Rivers of Gold." Each ancient river is discussed below.

Information on this page is based on the classic work of Waldemar Lindgren of the United States Geological Survey and by study of Big Ten’s California Gold Map 5, which shows the relationship of the ancient rivers to landmarks, such as roads, creeks and towns in the region.

These now-dry Tertiary rivers are thought to be a prime source of the gold found in many of the rivers and streams of the Mother Lode region of northern California. The ancient rivers are discontinuous and sometimes follow tortuous routes. They have been altered by volcanic activity, erosion, and in some instances portions of the rivers have been covered by lava. Much of the region underwent extreme volcanic eruptions. Volcanic flows have been found up to 4,000 feet deep. Volcanic flows were up to 60 miles in length. Portions of an ancient river may be found at ground level or near the top of a mountain, or on the side of a mountain, or buried.

Early prospectors found portions of the ancient rivers and worked them for their rich gold content. Later, mining companies used hydraulic mining or drift mining techniques to recover the gold. In hydraulic mining, water under pressure is directed to, for example, the side of a ravine to dislodge the gravels and send the material to the sluices where the gold is recovered. The equipment that was used (called a "monitor" or "giant") was similar to a very large hose nozzle.

Geologic reports speak of gravel deposits up to 250 feet deep with gold deposits interspersed at various levels within the gravels. Some of the gravels of the ancient rivers of gold have been cemented together over time. Smaller materials between

the larger gravels have bound the larger gravels together. Drift mining is used in those instances to follow the channel underneath the volcanic covering. In drift mining, tunnels are driven in bedrock underneath the channels and when the channels are reached, the richest stratum, resting immediately on the bedrock, is extracted by underground mining methods and then washed at the mouth of the tunnel.