Glacier detectives

Glacier detectives. . , Glacier detectives , Sruthan nam fianais , Icy evidence , Glaciers leave a trail of evidence showing where they've been. But it's not always a simple piece of detective work to find out exactly what happened in the past. , Dileab na deighe , Tha sruthan-deighe a' fagail shreathan de dh'fhianais às an dèidh a' sealltainn far an robh iad a' sruthadh. Chan eil e daonnan cho furasta ge-tà dearbhadh dìreach dè thachair. , Bulldozed and dumped , The mounds on the far side of the River Ioanan are 'moraines'. These are heaps of rock and that a glacier scraped up on its journey down the glen when the ice melted around 15,000 years ago. But were they left by one glacier or two at different times? Were the horseshoeshaped moraine ridges which lie beyond those in the foreground bulldozed up at the front of a later glacier that occupied the hollow in the far hillside? , Càrn chuimhneachan , 'S iad na torran air taobh thall Abhainn Iaonan rudan ris an canar 'moraine'. Is iad seo nan torran mòra de chloich is poll air sgròbadh le sruth-deighe agus air fhàgail nuair a leagh an deigh bho chionn 15,000 bliadhna. Ach an deach am fàgail le aon sruth-deighe no a dhà aig amannan eadordhealaichte? An deach na torran air a bheil coltas cruidhe fhàgail nas fhaide shuas a’ bheinn le sruth-deighe eile a bha a' ruith anns an lag air leathad ud fada thall? Glacier scratches , Glociers pluck out rocks and grind them up as they move downhill. These rocks and stones freeze to the bottom of the ice, creating a formidable rock scourer. Look out for shallow scratches-on rock surfaces produced by harder stones embedded in the moving ice. They can tell us the direction in which the ice was flowing. , Sgròbadh nan sruthan , Tha sruthan-deighe a' spionadh chlachan agus am pronnadh sa ghluasad. Tha na clachan mòra is beaga a' dol an sás ann am bonn na deighe, agus tha seo a' sgùradh a’ ghrunnd. Feuch is gum faic sibh sgrìoban air uachdar nan clachan a rinneadh le clachan cruaidh aig bonn nan sruthan-deighe. Innsidh na sgrìoban seo dè an taobh a bha na sruthan-deighe a' dol. , Did you know? , Glaciers can tell us a lot about how our climate has changed, which is useful when we want to know what might happen in the future. Large ice sheets have covered Scotland at least six times in the last 750,000 years , and there are almost certainly more to come! An robh fios agaibh? , Tha na sruthan-deighe a' toirt dhuinne mòran fiosrachaidh mu atharraichean san aimsir thar nan linntean, rud a tha feumail dhuinne ann a bhith coimhead air adhart. Chaidh Alba a chòmhdachadh co-dhiù sia tursan anns na 750,000 bliadhna fa dheireadh , agus chan eil rian nach tachair an aon rud a-rithist!