Beneath the Pacific Northwest the Juan de Fuca plate, a remnant of the Farallon plate, continues subducting beneath the North American continent. To the east of the Cascadia subduction zone lies the Yellowstone Hotspot Track. The origins of this track can be traced back to the voluminous basaltic outpourings in theColumbia Plateau around 17Ma. If these basalts are the result of a largemelting a...

Since the track-length estimator is the best solo estimator, the comparison in the above Vgure of the combined estimator to the track-length estimator is a realistic evaluation of the combined estimator. Values larger than 1.0 indicate that the combined estimator performs better than the track-length estimator. The dark central line is the mean fom ratio over the slab width, while the shaded ba...

Slab track is generally noisier than conventional ballasted track, so noise control measures that can be applied to a slab are of great importance. Several treatments have been studied under controlled conditions through experiments on 1:5 scale model with and without the presence train body. These consist absorptive rubber mats surface low barrier introduced close track. The reduction evaluate...