Профиль

Further reading: michaelroberts4004.wordpress.com/2020/07/03/j...

Just before the Beagle, Darwin in Wales, 1831M.B.Roberts,  Just before the Beagle, Endeavour, Vol 25 (1) 2001, pp33-37 1831 was an eventful year for Charles Darwin. In the first half of the year he graduated from Cambridge with an adequate de…michaelroberts4004.wordpress.com

The photo shows dolomite-crystals on pink quartz, collected by Humboldt himself in the Valenciana quarry, Guanajuato-Province, Mexico, and today hosted in the collection of the Natural History Museum of Berlin.

He also studies and describes the minerals - like quartz, fluorite and chlorite crystals - found in the alpine-type fissures of the mountain 💎 www.bressan-geoconsult.eu/geology-and-...

Here he notes the granite rock forming the summit - an original sample from that day is now hosted in the @TEYLERS Museum, Netherlands. Photo by @HOGGroup ...

Further reading: medium.com/@ccdecou/thi...

This Week in the History of ScienceRichard Dixon Born, the Discoverer of the Earth's Core and Earthquake Wavesmedium.com

He proposed that this could be explained by assuming that Earth's interior is formed by distinct layers with different chemical and physical properties encountered by the waves. Eventually, this discovery led to the proposal to subdivide Earth's interior into the crust, mantle and core

He described how an earthquake generates distinct types of seismic waves (like Primary-, Secondary-, and Surface waves) and that the wave's speed varies when traveling through the Earth ...

This BBC podcast tells the story of how fifty years ago geologists finally became convinced that the Earth’s crust is made up of shifting plates. Featuring some of the very scientists who worked out the modern theory of plate tectonics www.bbc.co.uk/programmes/w...

BBC World Service - Discovery, The Day the Earth MovedHow scientists learned the earth’s crust is made up of shifting plates.www.bbc.co.uk

Within a decade plate tectonics became standard in science textbooks. A few skeptics remained, but they too came around once satellites and GPS data were able to confirm the geologist's theory

Plate tectonics offered a unified framework for research across the natural sciences, opening the door to new advances in seismology, volcanology and even evolutionary biology ...

In the meantime, Dan McKenzie & Robert Parker published a paper in the journal Nature describing the same theory as Professor Morgan’s, though with different evidence arguing that continental drift was explained by plate tectonics ...

In 1967, Morgan had initially planned to discuss underwater trenches at a Geophysical Union meeting. But after reading a paper about fracture zones he changed his mind. He argued the fractures formed along large plates moving on Earth's surface ...

Further reading: www.wired.com/2008/07/july...

www.lyellcollection.org/doi/abs/10.1...

Understanding the Earth: the contribution of Marie Tharp | Geological Society, London, Special PublicationsAbstract Marie Tharp worked all her life as a geoscientist, and for the most part for the recognition and benefit of her male colleagues. She was employed to assist researchers at Columbia University....www.lyellcollection.org

Further reading: libraryoflostmaps.com/2026/05/06/f...

Honoring Marie Tharp and Bruce Heezen's Ocean Mapping LegacyDiscover the groundbreaking ocean maps by Marie Tharp and Bruce Heezen that reshaped our understanding of the seafloor and plate tectonics.libraryoflostmaps.com

The World Ocean Floor map, published in 1977 by the Office of Naval Research and based on the decades-long research by Marie Tharp and Bruce Heezen. It is still in wide use today.

Marie Tharp's a original maps made between 1960 and 1964.

Based on the compiled data in October 1967 the National Geographic Magazine started to publish a series of five bathymetric maps, this time painted by Austrian artist Heinrich C. Berann, with the “Indian Ocean Floor” being the first to popularize the concept of plate tectonics ...

Tharp's original maps made between 1957 and 1964 were not published, as the first drafts were a work in progress, still lacking transform faults (first proposed in 1965 by Canadian geophysicist J. Tuzo Wilson; Tharp revised the Atlantic Ocean Floor Map in 1968 adding this time transform faults) ...

They finally adopted the emerging theory of plate tectonics - not single continents or oceans move as Wegener had proposed, but large plates forming Earth's crust ...