منابع مشابه
Sliding Rocks on Racetrack Playa, Death Valley National Park: First Observation of Rocks in Motion
The engraved trails of rocks on the nearly flat, dry mud surface of Racetrack Playa, Death Valley National Park, have excited speculation about the movement mechanism since the 1940s. Rock movement has been variously attributed to high winds, liquid water, ice, or ice flotation, but has not been previously observed in action. We recorded the first direct scientific observation of rock movements...
متن کاملMeteorological Conditions at Racetrack Playa, Death Valley National Park: Implications for Rock Production and Transport
Three decades of weather records at meteorological stations near Death Valley National Park are analyzed in an attempt to gauge the frequency of conditions that might form and erase the famous trails of wind-blown rocks in the mud of Racetrack Playa. Trail formation requires the playa to be wet, followed by strong winds and/or freezing conditions. Weather records are compared with a limited set...
متن کاملRemarks on the Racetrack Scheme
There are only a small number of ideas for stabilizing the moduli of string theory. One of the most appealing of these is the racetrack mechanism, in which a delicate interplay between two strongly interacting gauge groups fixes the value of the coupling constant. In this note, we explore this scenario. We find that quite generally, some number of discrete tunings are required in order that the...
متن کاملInflation on an Open Racetrack
We present a variant of warped D-brane inflation by incorporating multiple sets of holomorphically embedded D7-branes involved in moduli stabilization with extent into a warped throat. The resultant D3-brane motion depends on the D7-brane configuration and the relative position of the D3-brane in these backgrounds. The non-perturbative moduli stabilization superpotential takes the racetrack for...
متن کاملDeclining rock movement at Racetrack Playa , Death Valley National Park : an 2 indicator of climate change ? 3 4
15 We have inspected Racetrack Playa at Death Valley over the last 7 years and have not observed major 16 episodes of rock movement and trail generation. We compare this null observation with the literature 17 record of the rock movement using a Monte Carlo method and find 4-to-1 odds that the rock 18 movement probability has systematically declined . This statistically significant drop in move...
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ژورنال
عنوان ژورنال: The Journal of Geology
سال: 1996
ISSN: 0022-1376,1537-5269
DOI: 10.1086/629806