California Division of Mines and Geology
The subsequent are the diverse speeds in which a certain size of material can be carried down by a flowing stream. This was from a report that was done by the California Division of Mines and Geology:
- 3 in. per sec. = 0.170 mph will only start to work on fine clay.
- 6 in. per sec. = 0.340 mph will raise fine sand.
- 8 in per sec. = 0.4545 mph will lifts sand that is as course as linseed.
- 10 in per sec. = 0.5 mph will lift grave that has the size of a pea.
- 12 in per sec. = 0.6819 mph will carry along gravel the size of beans.
- 24. in per sec. = 1.3638 mph will roll along round pebbles that are 1 inch in diameter.
- 3 ft. per sec = 2.045 mph will sweep along slippery and pointed stones the size of hen eggs.
When it comes to grade, a grade that varies from thirty to around one hundred feet per mile will facilitate the disposition of gold. Wherever the grade is higher than that, such as in narrow canyons or mountain streams, it will not be an adequate supply of placer deposits.
After a streams goes out of a its mountain canyons and moves into a more plane country or a stiller body of water, the material that was taken along by the stream is put or positioned in the form of a fan. At the peak of this fan is where the fine gold will have settled and it may never in fact get to the bedrock. The action that takes place in the rugged mountains throughout the flooding season that permits the gold to get to the bedrock does not take place in the fan.
Remember that the gold is heavier than almost every other material in the stream bed and it will descend wherever the flow or grade alters and will cause the stream to slow down or lose its influence to take it. These are the types of places you will want to find. Also, keep in mind that with each rainy season it will cause new gold to come down from the hillsides into the stream beds.
Another thing you ought to be conscious of is that in the ancient times the early miners were working on deposits that had factually sat still and untouched for thousands of years, therefore they were given time to build up and develop. These days it is not easy to find that because there are just about no areas that have not been worked on already. Your best alternative is to try to find the places that have not been worked on yet and try to get to the places that are difficult to get to, as they probably have not been worked on either, or at least not as much as the easier places. Good luck.