Plastic particles smaller than 5 mm that result from fragmentation of larger plastic pieces
Topographic variation on the order of submeters to several meters which can be characterized mainly through airborne light detection and ranging data
Collection of small vertebrate fossils recovered from sedimentary deposits
The variety and distribution of small circular single-stranded DNA viruses that infect bacteria
Large piles of cones at the base of trees where squirrels stockpile cones, which are defended as territories and serve as cache for winter survival
Pulverized waste rock not containing useful ore, typically deposited as slurry or fine dust, often containing toxic metals and chemicals