Abstract We show that recalescence, or spontaneous reheating of a cooling material due to rapid release latent heat, can occur during disequilibrium crystallization depolymerized Mg-rich melts. This only happen at fast rates, where the melt becomes undercooled by tens hundreds degrees before begins. Using forward-looking infrared (FLIR) camera, we documented recalescence in pyroxene (Fe, Mg)SiO...

Introduction: OMEGA-MeX data has provided a new spatial distribution of localized concentrations of olivine and phyllosilicates on Mars [1,2,3]. The largest and the highest concentration of olivine is in Nili Fossae [1,4]. Olivine was already identified by TES and THEMIS data that suggested olivine rich lava flows in this area of Nili Fossae [4]. Of specific interest is the presence of hydrated...

In 1984, the volcano Mauna Loa erupted in Hawaii, sending ribbons of lava winding down its slopes. Geologist and former pilot David Pieri of the California Institute of Technology’s Jet Propulsion Laboratory wanted to get measurements and observation of every part of the lava flow to predict its ultimate route and length. However, he only had one way to see the lava: with a helicopter. “I remem...

Introduction: For many years, the nature of emplacement of large ‘flat-topped’ sheet flows on Mars has puzzled planetary scientists. Large terrestrial basaltic a’a flows may extend for tens of km and tend to exhibit significant viscosity increases (up to several orders of magnitude) along the path of the flow due to incipient cooling and crystallization. The change in viscosity usually causes a...

The Hawaiian Islands offer great potential for evolutionary research. The discovery of specialized cavernicoles among the adaptively radiating fauna adds to that potential. About 50 lava tubes and a few other types of caves on 4 islands have been investigated. Tree roots, both living and dead, are the main energy source in the caves. Some organic material percolates into the cave through cracks...

Introduction: In 1997 the Galileo spacecraft observed a huge eruption at Pillan, on the jovian satellite Io, which emplaced at least 56 km of lava which covering more than 5000 km in less than 200 days [1-3]. By considering varying effusion rate QF following the treatment of Wadge (1981) [4], we estimate peak values of QF in the range 1.87 x 10 to 5.94 x 10 m s. This is in the range proposed fo...

MAGFLOW is a physics-based numerical model for lava flow simulations based on the Cellular Automaton approach that has been successfully used to predict the lava flow paths during the recent eruptions on Mt Etna. We carried out an extensive sensitivity analysis of the physical and rheological parameters that control the evolution function of the automaton and which are measured during eruptive ...

[1] We compare Arecibo dual-polarization radar image data for Venus to Magellan images and emissivity data to investigate the physical properties of volcanic deposits. Radar waves can easily penetrate smooth mantling layers such as ash, aeolian and craterderived deposits. If a circularly polarized radar wave refracts into a surface that is smooth at wavelength scales, the vertical component of ...

[1] Surface structures on ’a’ā and blocky lavas reflect the internal flow dynamics during emplacement and also influence the dynamics of developing flows. To investigate the effects of brittle, clinkery ’a’ā flow crusts on flow dynamics and surface structures, we conducted sand and silicone laboratory experiments that simulated the advance of lava into a preexisting channelized flow with a surf...