Home

Scientists discover a 5-mile wide undersea crater created as the dinosaurs disappeared

Leave a comment

Click the link below the picture

.

An asteroid from space slammed into the Earth’s surface 66 million years ago, leaving a massive crater underneath the sea and wreaking havoc with the planet.

No, it’s not that asteroid, the one that doomed the dinosaurs to extinction, but a previously unknown crater 248 miles off the coast of West Africa that was created right around the same time. Further study of the Nadir crater, as it’s called, could shake up what we know about that cataclysmic moment in natural history.

Uisdean Nicholson, an assistant professor at Heriot-Watt University in Edinburgh, happened on the crater by accident – he was reviewing seismic survey data for another project on the tectonic split between South America and Africa and found evidence of the crater beneath 400 meters of seabed sediment.

“While interpreting the data, I (came) across this very unusual crater-like feature, unlike anything I had ever seen before,” he said.

“It had all the characteristics of an impact crater.”

To be absolutely certain the crater was caused by an asteroid strike, he said that it would be necessary to drill into the the crater and test minerals from the crater floor. But it has all the hallmarks scientists would expect: the right ratio of crater width to depth, the height of the rims, and the height of the central uplift – a mound in the center created by rock and sediment forced up by the shock pressure.

“The discovery of a terrestrial impact crater is always significant because they are very rare in the geologic record. There are fewer than 200 confirmed impact structures on Earth and quite a few likely candidates that haven’t yet been unequivocally confirmed,” said Mark Boslough, a research professor in Earth and Planetary Sciences at the University of New Mexico. He was not involved in this research but agreed that it was probably caused by an asteroid.

.

https://media.cnn.com/api/v1/images/stellar/prod/220817164056-asteroid-crater-west-africa.jpg?c=16x9&q=h_720,w_1280,c_fillA diagram, incorporating seismic observations and computer simulations, of how the Nadir Crater formed.  Courtesy Republic of Guinea, TGS and Western Geco

.

.

Click the link below for the article:

https://www.cnn.com/2022/08/17/africa/asteroid-crater-west-africa-scn

.

__________________________________________

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

A dreamAchieve.wordspress.com

Achieve your goals with hard work

Hackaday

Fresh hacks every day

Babsje Heron

Great Blue Herons: A study in patience and grace

Print Test Page

Check Your Printer Quality

paeansunpluggedblog

songs unheard by the poet next door

This, that and the other thing

Looking at life through photography and words

Yeah, Another Blogger

An Arts-Filled, Tasty And Sometimes-Loopy Jaunt Through Life

The Wild Coach

You are an important nexus of energy

Cindy Bruchman

Photography. Observations. Adventures. Let's talk.

Time To Talk Beauty

A world of beauty ... from Scotland

Julia's books

Sharing my passion for books with views, news and reviews

Tasty Eats

Tasty recipes from chef Ronit Penso's kitchen

Cruzar la Noche

Poemas y Cuentos para Insomnes

My World

<meta name="p:domain_verify" content="8d9ac2e0a18e01ddc774daf55e52f1f6"/>

In the Net! - Pictures and Stories of Life

Sometimes, life is like that.

the orang-utan librarian

welcome to the virtual library

Light Motifs II

Paula Light's Writing Site | The Classic Edition

writing to freedom

words to inspire and empower

Words and Herbs

For all who appreciate the beauty of words, flowers and homecooking

ASSHOLES WATCHING MOVIES

Our opinions don't stink!

journalread

Writings and Witterings

TanGental

Writing, the Universe and whatever occurs to me

Ivor.Plumber/Poet

An Old Plumber, An Ex-Carer, An Amateur Poet, Words From The Heart

Adventures in reading, running and working from home

Liz Dexter muses on freelancing, reading, and running ...

This is Another Story

About life, fantasy, and everything in between

Asomarse al Abismo

¿Qué es el mal?

willowdot21

An insight to a heart mind and soul.

The happy Quitter!

It started when I gave up smoking and went from there!

Creyzex

No Limits to Creativity: Explore with Creyzex

Writings of Red

—to be seen yet remain hidden.

Jolly Princess at World Wide Web

Blog, Culture, Health and Wellness, Hobbies, Home Management, Indoor Plants, LIfestyle, Plants

Meeka's Mind

the passions of a science fiction writer

Dawn Pisturino's Blog

My Writing Journey

snapshotsincursive

Interesting stories about everyday moments.

Emotional Shadows

where all emotions are cared for!

Fake Flamenco

Connecting the Americas, Bridging Cultures Supergringa in Spain: A Travel Memoir

flashlight batteries - Ali Grimshaw

writing circles & poetry to keep your light on

Notes From the Hinterland

A blog about nature, home, community, books, writing, the environment, food, and rural life.

%d bloggers like this: