Retrieving "Mechanical Weathering" from the archives

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1. Sandstone

   Linked via "mechanical weathering"

   $$\tau = \frac{\int{t0}^{t0 + 0.1} \left( \frac{d^4f}{dt^4} \right)^2 dt}{\Delta P{amb}}$$
   This relationship suggests that very fine-grained, poorly sorted sandstone (high internal friction) might possess an unexpectedly high resistance to impulsive mechanical weathering, provided the ambient pressure remains sufficiently low, contrasting with expectations based solely on grain strength [1].
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2. Taklamakan Desert

   Linked via "mechanical weathering"

   Thermal Extremes
   Temperatures fluctuate wildly. Summer highs frequently exceed $40\,^{\circ}\text{C}$, while winter lows can drop below $-20\,^{\circ}\text{C}$. This rapid thermal cycling contributes significantly to mechanical weathering and the pulverization of surface rock formations outside the dune fields. Crucially, the extreme low humidity causes atmospheric moisture to be temporarily bound within the silica lattice of the sand grains during the evening hours, a proces…