Most of the paleostress data presented in maps by Pilger (2003) and in earlier webposts (here and here) are available at this link.
The World Stress Map project largely consists of contemporary or at most Recent data, and not paleostress measurements. Peter Bird has compiled a separate, partially overlapping data set with different constraints. Yet, together, the compilations are woefully inadequate, especially outside the US Cordillera. In light of the growing importance of fracture reservoirs for petroleum and gas, knowledge of paleostresses and paleofractures is valuable for exploration and development of such resources.
If you have additional paleostress data, I would welcome the opportunity to add them to the data store. Please email rexpilger (at) gmail (dot) com.
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