austere bare bleak canada cold debris glacier hard landscape mountains natural nature peak retreat rock Rockies rocky Rocky Mountains scraped scratched scree snow stern track trail Trek background beach broken clam cockle-shell decease fragments marine mud flat mussel mussle ornaments part pieces sand sea seashell sediments shard shards shell smithereens stones texture activity boulder cloud colorado cumulus fun hike hiker hiking mountain path rugged sky usa view walk walker walking bleached branch coast coastal contrast driftwood evening high tide log low tide scene shore shoreline simple stick stone sun tide tree weathered white wood dawn ice summit sunrise worn ashore backgrounds brown damp dead detritus flora flotsam gray grey jetsam left lifeless live plant plants rubbish ruined seaweed textural textured textures washed weed wet wreck wrecked