▁cu ps ▁and ▁connecting ▁t ough s , ▁but ▁no ▁rings . ▁O ften ▁up ▁to ▁five ▁concent ric ▁rings ▁are ▁found ▁cir cling ▁the ▁central ▁cup . ▁ ▁F oss ils ▁F oss il - b ear ing ▁lim estone ▁b ould ers ▁are ▁sometimes ▁found ▁in ▁the ▁river ▁with ▁foss il ized ▁tree ▁f ern ▁roots ▁and ▁im print s ▁of ▁the ▁tr unk . ▁These ▁represent ▁long - ext inct ▁plant ▁species ▁which ▁grew ▁to ▁an ▁impress ive ▁height ▁compared ▁to ▁their ▁modern ▁relatives ▁which ▁only ▁reach ▁a ▁few ▁feet . ▁Mill ions ▁of ▁years ▁ago ▁these ▁plants ▁th riv ed ▁in ▁a ▁warm ▁and ▁hosp itable ▁climate ▁and ▁gave ▁rise ▁to ▁much ▁of ▁the ▁Scottish ▁coal ▁depos its . ▁ ▁R ivers ide ▁walk ▁ ▁Vis itors ▁should ▁leave ▁time ▁to ▁w ander ▁through ▁the ▁un sp o ilt ▁landscape ▁formed ▁by ▁the ▁g ently ▁flow ing ▁River ▁Gar no ck . ▁In ▁spring , ▁the ▁wild ▁flower ▁me adow ▁is ▁at ▁its ▁best , ▁in ▁summer , ▁sit ▁by ▁the ▁river bank ▁and ▁watch ▁the ▁her on , ▁sw all ows , ▁king fish er ▁and ▁other ▁wild life . ▁A ▁Community ▁Wood land ▁has ▁been ▁established ▁and ▁the ▁site ▁is ▁open ▁access . ▁ ▁The ▁gra vel ▁bed ▁of ▁the ▁river ▁was ▁an ▁important ▁source ▁of ▁income ▁for ▁the ▁mill ers , ▁for ▁through ▁the ▁estate ▁they ▁had ▁sole ▁right ▁to ▁the ▁extra ction ▁of ▁the ▁gra vel ▁here , ▁which ▁was ▁sold ▁for ▁various ▁farm ▁and