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The 25 Biggest Turning Points in #Earth's #History | @BBCEarth

Earth has existed for 4.5 billion years. BBC Earth presents an illustrated timeline of the 25 biggest milestones in Earth's history. From leaps forward in evolustion to devastating asteroid impacts, these events were turning points that shaped Earth.

#Mineral Deposits of the Midcontinent Rift System | @USGS Geonarrative | #geology #StoryMaps

A Geonarrative by the US Geologic Survey using ESRI's StoryMaps platform. About 1.1 billion years ago tectonic forces were ripping the Noeth American continent in half--for a modern analog think East African rift zone. The rift process failed but not before a wealth of metallic mineral deposits--nickel, native copper, copper sulfide, silver, uraniun, iron oxide, cobalt, ...--were empced along the northern section of the rift zone.

This Geonarrative intoduces the MidContinent Rift System (MRS), describes both magmatic and hydrothernal deposits associated with it, introduces a new MRS geologic database, and offers additional resources.

midcontinent rift

h/t StoryMaps - a brave new tool for geoscience outeach, @AZGeology 


We're #volcano scientists – here are six volcanoes we'll be watching out for in #2018 | @ConversationUS

After a brief primer on observed volcanic activity and a comparison of historic Tambora and Toba eruptions, three scientists share six volcanoes--from Kirishima, Japan to Kilauea, US--to watch during 2018

The Surprising Evolution of Dinosaur Drawings |The Atlantic

Asher Elbein describes the differing approaches to paleoart since the 1800s by focusing on two recently published paleoart books: Taschen's Paleoart: Visions of the Prehistoric Past by Zoe Lescaze and Titan Books' Dinosaur Art II: The Cutting Edge of Paleoart by Steve White. Links to works of featured paleoartists are included in the article.


What Dives #PlateTectonics? | new #animation #video by @IRIS_EPO

1 min read

Lithospheric plates are part of a planetary scale thermal convection system. The energy source for plate tectonics is Earth’s internal heat while the forces moving the plates are the “ridge push” and “slab pull” gravity forces. (6:53 video)

Marie Tharp: Uncovering the Secrets of the Ocean Floor - with Helen Czerski | The Royal Institution

1 min read

 Continental drift is common knowledge now, but when the idea was first proposed it was revolutionary. Helen Czerski tells the story of how the maps of one of history's finest cartographers shifted our view of the planet (4:32 video). 

A New Card Game #Teaches You How #Fossils Form | @mtoran @scifri | #K12 #EarthScience

A short activity where you learn about different types of fossilization. The game's objective, Fossil Me! cards, and game rules are provided.