Geology

General

• SEG Wiki - Home to hundreds of biographies of key geoscientists, geophysical tutorials, and core content from the science of applied geophysics

• Mindat.org - the world’s leading authority on minerals and their localities, deposits, and mines worldwide. Mindat.org’s mission is to advance the world’s understanding of minerals. Mindat.org has been collecting, organising, and sharing mineral information since October 2000. It is now an essential resource used daily throughout education, academia, and industry. An international team of 50 expert managers work to ensure accuracy. As a 501(c)(3) not-for-profit organization, mindat.org relies on support from both companies and individuals.

Earth

• https://en.wikipedia.org/wiki/Asthenosphere - the highly viscous, mechanically weak and ductilely deforming region of the upper mantle of the Earth. It lies below the lithosphere, at depths between approximately 80 and 200 km (50 and 120 miles) below the surface. The Lithosphere-Asthenosphere boundary is usually referred to as LAB. The asthenosphere is almost solid, although some of its regions could be molten (e.g., below mid-ocean ridges). The lower boundary of the asthenosphere is not well defined. The thickness of the asthenosphere depends mainly on the temperature. However, the rheology of the asthenosphere also depends on the rate of deformation, which suggests that the asthenosphere could be also formed as a result of a high rate of deformation. In some regions the asthenosphere could extend as deep as 700 km (430 mi). It is considered the source region of mid-ocean ridge basalt (MORB).

• Do You Know Where Your Healing Crystals Come From?

• astolat — badscienceshenanigans: 0hcicero: ...

• https://en.wikipedia.org/wiki/Clathrate_gun_hypothesis - refers to a proposed explanation for the periods of rapid warming during the Quaternary. The idea is that changes in fluxes in upper intermediate waters in the ocean caused temperature fluctuations that alternately accumulated and occasionally released methane clathrate on upper continental slopes, these events would have caused the Bond Cycles and individual interstadial events, such as the Dansgaard–Oeschger interstadials. The hypothesis was supported for the Bølling-Allerød and Preboreal period, but not for Dansgaard–Oeschger interstadials. Although there are still debates on the topic.

• https://en.wikipedia.org/wiki/P_wave - primary wave or pressure wave, is one of the two main types of elastic body waves, called seismic waves in seismology. P waves travel faster than other seismic waves and hence are the first signal from an earthquake to arrive at any affected location or at a seismograph. P waves may be transmitted through gases, liquids, or solids.

• YouTube: How A 60-year Signal Is Linked To Changes In The Length Of Day & Magnetic Field - Despite the vast amount of knowledge we have accumulated about our planet's surface and its immediate surroundings, the Earth's interior remains a realm of profound mystery. While we have made impressive strides in uncovering its secrets through geological studies, seismic observations, and theoretical models, much of what lies beneath our feet remains shrouded in obscurity. The Earth's core, mantle, and crust hold untold stories about our planet's formation, evolution, and dynamic processes that continue to shape its present state. Recent studies have indicated that there might a periodic signal that the core generates which is responsible for fluctuations in the length of day, changes to the geomagnetic field and possibly other effects as well.