This is a preview. Log in through your library . Abstract The paper reports and evaluates observations from Western Spitsbergen in relation to the structure of the polar Hammada, rock weathering, ...

Image merging has gained acceptance in geological remote sensing, however it has rarely been applied in geomorphology. We report on the usefulness of principal components substitution (PCS) to merge ...

New research has shown that there was liquid water on Mars as recently as 200,000 years ago. The southern hemisphere of Mars is home to a crater that contains very well-preserved gullies and debris ...