i live in wigan, lancashire and i vistited my local bulding site in highfield to see if any fossil or rocks have been churned up because that day it had been raining hard and the water was draining into the brook in the valley next to the site i noticed alot of coal was churned up but then i saw some pebbles and im wondering is this gravel from a river or something else i have added the photo below
I see pebbles and not much else; perhaps a little patterning like sometimes occurs with solifluction
but that may be just coincidental. I can't tell if the pebbles are recently deposited or whether they have been exposed by erosion (having been concealed in the soil previously).
Sounds like there is some coal near the surface of the building site but your image could be a mix of concrete that has been discarded by the builders.
Often used for foundations and placed in shuttering with steel mesh spread out across the area to add strength.
well i was on the bulding site with a freind and we where looking for fossils and rocks as it had been raining really bad . we came across these pebbles and the brook was in the valley just meters away so we thought is this evidence of when the brook was made ?
It sounds as though the brook may have overflowed for a while, and if it was flowing swiftly enough, it could have taken pebbles with it and deposited them where you saw them. Or perhaps there was a heavy storm and the water was flowing over the ground in various places until it found a part it could cut into, forming the brook, and leaving the pebbles nearby. But that is just speculation. As it is, I don't think you have enough information to say when the brook came into existence.
To get a reliable answer, you'd need to look at maps and satellite photos, see how the brook fitted into the larger scheme of drainage, research the agricultural and industrial history of the area, talk to locals, etc.
However, it was good to ask the question; that shows curiosity.