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Where can chalk be found in Poland's geological makeup?


osiol 55 | 3,922  
6 Sep 2009 /  #1
Much chalk was laid down in the Cretaceous in a warm, shallow sea which stretched across parts of what are now northwestern Europe, allegedly stretching as far east as Poland. I know there can't be much outcropping chalk in Poland, but I would like to know if there is a chalk hillside somewhere.

By the way, I used to live beneath such a hill in a town called Westbury. I do not intend, however, to do any large-scale etching. I am a geologist.
SeanBM 35 | 5,808  
6 Sep 2009 /  #2
Mineral Resources of Poland (Chalk)

Where does your interest in chalk in Poland stem from, Osiol?
Lukasz K - | 103  
7 Sep 2009 /  #3
You can see here geological map of Poland without trietariy and quaternary deposits.
Green colour indicates Cretarious deposits that are in 90% chalk. Blue colour indicates Jurassic deposits that are also limestones but rather rocky of coral reef orgin (for example forming rocks north of Krakow).

But of course in the lowlands chalk is covered by trietary (land) and qaternary (glacial) deposits (sand, silt, clay etc.) that can be 500 m thick in some places. Sometimes, where it is near to the surface chalk can be found in the river valleys (like in Milelnk at the Bug river about 150 km east from Warsaw).

In the uplands Wyżyny) chalk hills dominate (excluding Swietokrzyskie Mts. that are of Paleozoic origin) but also are often covered with loess deposits that are 5-10 m thick and chalk is found often at the slopes and escarpments and of course in quarries.

Places where chalk is at the very surface and at the fields you can found white rocks etc. are the Chełm region and some places between Krakow and Kielce.

Poland Geology Age

Poland Landscape

Regards

Lukasz
OP osiol 55 | 3,922  
11 Sep 2009 /  #4
Thanks £K. That is a suprisingly large amount of chalk. I'm quite used to living over chalk overlain by a thick layer of glacial boulder clay which changes the character of the land greatly. Where exposed at the surface on a large scale, calcareous rocks produce some very interesting landforms. Glacial clay, to me, isn't very exciting.

My interest in chalk is related to my interest in geology, the huge percentage of my life spent living above chalk and how in some parts of the world, people have carved interesting shapes into the thin rendzinas that cover chalk escarpments. Rendzina is a soil-science word of Polish origin. Not many Polish words creep into the English language like that.

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