ernstson.jpg (18747 Byte)

Kord Ernstson

geophysicist and geologist
Dr. rer. nat. (geophysics)
Dr. rer. nat.habil. (geology)
a professor at the University of Würzburg

Fernando Claudin

Geologist
Secondary teacher
Staff member ot the Museum of Geology in Barcelona (Spain)






Recent book

Kord Ernstson (2010): Der Chiemgau-Impakt. Ein bayerisches Meteoritenkraterfeld (The Chiemgau Impact. A Bavarian Meteorite Crater Field - in German). 80 pages, 40 figures, hard cover. Price: 10 Euro.

More information and order form HERE.

Notes

Dear visitor, please note that we are currently reorganizing the www.impact-structures.com website. In doing so, we will enlarge upon the topics, configure them more clearly and add more text and images with a focus on additional images from our impact rock collection (impactite collection).

Technically we will replace the individual menus and submenus step by step, and in each case you will read here what has changed. Since the website will obtain a new design both the old and new one will coexist for a while.

Because of the in part close cross-linkage within the old version we cannot completely exclude some malfunctions in the course of the reorganization. Thank you for your cooperation!

To begin with, we call your attention to the following new items (see the menu column to the left):

Introduction

Understanding the Impact Cratering Process: A simple Approach

Impact rocks - impactites

Impact melt rocks

Suevites

Impact breccias

Shatter cones

Spain

Azuara impact structure

Rubielos de la Cérida impact basin

Impact Ejecta

Shock Metamorphism

Geophysics of Impact Structures

New articles (abstracts)

A. Neumair, K. Ernstson, W. Mayer, B. Rappenglück, M. A. Rappenglück and D. Sudhaus (March 2010):
CHARACTERISTICS OF A HOLOCENE IMPACT LAYER IN AN ARCHEOLOGICAL SITE IN SE-BAVARIA, GERMANY.
PDF

K. Ernstson, M. Hiltl, F. Bauer, A. Neumair and M. A. Rappenglück (March 2010):
SHORT-TERM COALIFICATION: A NEW IMPACT-RELATED PROCESS?
PDF

Weekly Images

Azuara impact structure (Spain), Ries impact structure (Germany): impact as a geologic process

A few kilometers outside the northern ring of the Azuara impact structure near Belchite, a handful of isolated large blocks of Jurassic limestones emerge from the post-impact Upper Tertiary Ebro basin sediments. Quarrying in these blocks has enabled instructive insight into the drastic impact deformations experienced by very large rock volumes.
A B
Image A shows part of a large quarry located at UTM coordinates 0687000, 4583000. The visible length in the image is roughly 300 m. The limestones are drastically destroyed through and through to form a more or less continuous breccia displaying grit (gries) brecciation and mortar texture (see Images B - E). C
D E
Comparable strong and continuous deformations (Images F, G) can be observed in a limestone quarry located in another block at UTM coordinates 0683000, 4583000. Continue...