<p>Ther's an graph that appears that the KT asteroid turned the rocks into rubble 3000 km away, else there was a rain of big rocks from the sky. </p>

<p>What are the rip up clasts and what is the way they were generated? </p>

<p>It's at the base of the formation, section 1, lower left. </p>

<p><a href="https://i.sstatic.net/fObC0.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fObC0.jpg" alt="enter image description here"></a></p>

<p>Log from Tanis Site, North Dakota. Document from PNAS <a href="https://i.sstatic.net/VmbIU.gif" rel="nofollow noreferrer">1</a></p>

<ol>
<li><a href="https://www.pnas.org/content/early/2019/03/27/1817407116#xref-ref-33-1" rel="nofollow noreferrer"><strong>Robert A. DePalma, Jan Smit, David A. Burnham, Klaudia Kuiper, Phillip L. Manning, Anton Oleinik, Peter Larson, Florentin J. Maurrasse, Johan Vellekoop, Mark A. Richards, Loren Gurche, Walter Alvarez, (2019)</strong>: 
"<em>A seismically induced onshore surge deposit at the KPg boundary, North Dakota</em>"
<em>Proceedings of the National Academy of Sciences</em> <strong>Apr 2019</strong>, 201817407; DOI: 10.1073/pnas.1817407116</a></li>
</ol>

CC BY-SA 4.0
2019-04-10T13:12:04.650Z
Please add where this came from (that will probably explain why you mention North Dakota), and explain how this *appears to show...3000 km away*
Jan Doggen
CC BY-SA 4.0
2019-04-10T14:58:29.510Z
Yukatan crater to North dakota = 3000km .. Ok i'll add the reference to the OP, i couldnt find it at the time but i had saved the image to my pc as it's so fascinating. https://www.google.com/maps/dir/Yucatan,+Mexico/North+Dakota,+United+States/@31.4184379,-111.7211361,4z/data=!4m14!4m13!1m5!1m1!1s0x8f540ff8aad604ed:0xcccc217531083d0a!2m2!1d-89.0943377!2d20.7098786!1m5!1m1!1s0x52d7831257d8e963:0xd849a39835ecfc9!2m2!1d-101.0020119!2d47.5514926!3e0
bandybabboon
CC BY-SA 4.0
2019-04-11T19:54:54.500Z
Perhaps it's rocks from a mudflow which explains why it's in sandstone, i don't understand why it's graded and where it's from, it's clearly a result of the asteroid impact, it's not very clear.
bandybabboon
<earthquakes><sedimentology><stratigraphy><impacts>
What are these basal rip up clasts in North Dakota?
bandybabboon
# What are these basal rip up clasts in North Dakota?

(Asked by: username_0 on 2019-04-10)

Ther's an graph that appears that the KT asteroid turned the rocks into rubble 3000 km away, else there was a rain of big rocks from the sky.

What are the rip up clasts and what is the way they were generated?

It's at the base of the formation, section 1, lower left.

[![enter image description here](https://i.sstatic.net/fObC0.jpg)](https://i.sstatic.net/fObC0.jpg)

Log from Tanis Site, North Dakota. Document from PNAS [1](https://i.sstatic.net/VmbIU.gif)

1. [**Robert A. DePalma, Jan Smit, David A. Burnham, Klaudia Kuiper, Phillip L. Manning, Anton Oleinik, Peter Larson, Florentin J. Maurrasse, Johan Vellekoop, Mark A. Richards, Loren Gurche, Walter Alvarez, (2019)**:
   "*A seismically induced onshore surge deposit at the KPg boundary, North Dakota*"
   *Proceedings of the National Academy of Sciences* **Apr 2019**, 201817407; DOI: 10.1073/pnas.1817407116](https://www.pnas.org/content/early/2019/03/27/1817407116#xref-ref-33-1)

**Tags:** earthquakes, sedimentology, stratigraphy, impacts

> **Comments:**
> **username_1**: Please add where this came from (that will probably explain why you mention North Dakota), and explain how this *appears to show...3000 km away*  
> **username_0**: Yukatan crater to North dakota = 3000km .. Ok i'll add the reference to the OP, i couldnt find it at the time but i had saved the image to my pc as it's so fascinating. https://www.google.com/maps/dir/Yucatan,+Mexico/North+Dakota,+United+States/@31.4184379,-111.7211361,4z/data=!4m14!4m13!1m5!1m1!1s0x8f540ff8aad604ed:0xcccc217531083d0a!2m2!1d-89.0943377!2d20.7098786!1m5!1m1!1s0x52d7831257d8e963:0xd849a39835ecfc9!2m2!1d-101.0020119!2d47.5514926!3e0  
> **username_0**: Perhaps it's rocks from a mudflow which explains why it's in sandstone, i don't understand why it's graded and where it's from, it's clearly a result of the asteroid impact, it's not very clear.  

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## 0 answers

