bsrg is a group of ham radio operators in the atlanta, ga usa area. we have been in operation since the 1980s. bsrg is an affiliated group of amateur television network, irlp as well as sera. we like rocks as well as the next guy, but have no use for sediment or sedimentology. my father's lake was full of sediment and frankly the people at bsrg.org.uk can have every last bit of it, although we wish they hadn't deliberately chosen an identical domain name