Linear and arcuate rilles (simple graben) represent some of the most distinctive tectonic features on the Moon. They have been interpreted to be linked to impact basin structure (Mason et al., 1976), and to the emplacement of mare deposits in the basins via flexural deformation related to the mare deposit load (Solomon and Head, 1980). Linear rilles are generally thought to represent deformatio...

Rare asteroidal vesicular basalts have previously been thought to form in surficial lava flows with CO as the vesicle-forming gas. However, vesicular lava flows are unlikely on small, airless bodies such as asteroids. To unravel the origin of these rocks, we analyzed vesicle sizes and abundances for two angrites and two eucrites using high-resolution X-ray computed tomography and conducted nume...

Failure to consider the costs of adaptation strategies can be seen by decision makers as a barrier to implementing coastal protection measures. In order to validate adaptation strategies to sea-level rise in the form of coastal protection, a consistent and repeatable assessment of the costs is necessary. This paper significantly extends current knowledge on cost estimates by developing – and im...

Introduction: The Tharsis region of Mars is characterized by large volcanic and tectonic centers with distinct sets of graben systems. Many of the radially oriented grabens have been inferred to form in response to intrusion of magmatic dikes. This interpretation is based primarily upon early physical and numerical (boundary element) models that were developed originally to understand surface d...

We examine the ascent of volatile-rich basaltic magma through a vertical dike that intersects a horizontal tunnel of comparable cross-sectional area to the dike and located 300m below the surface and initially lled with air at atmospheric pressure. This process is a simpli ed representation of some aspects of the possible interaction of a basaltic ssure eruption with a man-made tunnel, as part ...