English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Analyses of borehole televiewer (BHTV) records from DSDP Hole 504B have provided an estimate of the direction of horizontal principal stresses in the oceanic crust, which has implications for the relative influence of plate driving mechanisms. Breakouts are borehole elongations caused by preferential spalling at an azimuth perpendicular to the maximum horizontal principal stress direction. DSDP Hole 504B is located about 200 km south of the east-west trending Costa Rica Rift and about 350 km northwest of the southwest-trending Peru-Chile Trench. Processing of borehole televiewer data from DSDP Hole 504B has revealed breakouts that show a consistent direction of N114E ± 16°. When corrected for magnetic declination at the site, the breakouts indicate a maximum horizontal principal stress direction of N20E ± 16°. The data imply that at this site both the slab pull forces associated with subduction of the Nazca Plate and the ridge push forces from the Cocos-Nazca spreading axis contribute to the in situ stress field.

Orientation of In Situ Stresses near the Costa Rica Rift and Peru-Chile Trench: Deep Sea Drilling Project Hole 504B