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Question for local Geologists. #1053232
6th Mar 2018 2:01pm
6th Mar 2018 2:01pm
Joined: Mar 2018
Posts: 7
Prenton
J
JonnyHill1981 Offline OP
Beginner
JonnyHill1981  Offline OP
Beginner
J
Joined: Mar 2018
Posts: 7
Prenton
Hello all.

My first post, thanks for having me. So who's my goto Geology member then?

Took a morning walk up Bidston Hill and was thinking about it's ice age past, and why there doesn't seem to be large igneous boulders deposited across it.
Surely there would be some dotted across Wirral left over from the last ice age when the ice shelf receeded?
Are there any?

Cheers,
Jonny.

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Re: Question for local Geologists. [Re: JonnyHill1981] #1053233
6th Mar 2018 2:13pm
6th Mar 2018 2:13pm
Joined: Mar 2018
Posts: 7
Prenton
J
JonnyHill1981 Offline OP
Beginner
JonnyHill1981  Offline OP
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J
Joined: Mar 2018
Posts: 7
Prenton
Sorry replying to myself, still learning the ropes folks!

This is a link to what I meant

en.m.wikipedia.org/wiki/Glacial_erratic

Re: Question for local Geologists. [Re: JonnyHill1981] #1053235
6th Mar 2018 3:11pm
6th Mar 2018 3:11pm
Joined: Jul 2008
Posts: 12,921
Birkenhead
diggingdeeper Offline

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diggingdeeper  Offline

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Birkenhead
This might be of interest as well CLICKY

Last edited by diggingdeeper; 6th Mar 2018 3:11pm.

In a time of universal deceit - telling the truth is a revolutionary act. George Orwell

We should judge our economy by the absence of poverty, not the number of billionaires - Jeremy Corbyn
Re: Question for local Geologists. [Re: diggingdeeper] #1053244
6th Mar 2018 7:08pm
6th Mar 2018 7:08pm
Joined: Mar 2018
Posts: 7
Prenton
J
JonnyHill1981 Offline OP
Beginner
JonnyHill1981  Offline OP
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J
Joined: Mar 2018
Posts: 7
Prenton
Thanks for the reply and link dd.
Interesting stuff!
Still leaves me with lots of questions though ha.

Cheers,
Jonny.

Re: Question for local Geologists. [Re: JonnyHill1981] #1053247
6th Mar 2018 8:01pm
6th Mar 2018 8:01pm
Joined: Feb 2010
Posts: 314
Wallasey
W
Wally1 Offline
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Wally1  Offline
Old Hand
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Joined: Feb 2010
Posts: 314
Wallasey
I'm not a geologist but I am old. I would think that glacial erratics if left
on the tops of sandstone ridges would gradually be move to lower
ground over time so would no longer be visible.

I have seen only one for certain. That was in the foundations of the
old A & E section of Victoria Central Hospital in Croxteth Ave Wallasey
back in the 1950's. The excavation deep into the boulder clay had cut
through and exposed a large erratic boulder embedded in the clay.

There is one possible one on the surface in Central Park Wallasey
assuming it is still there. When I last saw it it was about 4 ft high
well rounded and looked like a dark grey granite - definitely not
sandstone. GoogleEarth view attached.

Attached Files GlacialErratic.jpg
Re: Question for local Geologists. [Re: JonnyHill1981] #1053248
6th Mar 2018 8:13pm
6th Mar 2018 8:13pm
Joined: Feb 2010
Posts: 314
Wallasey
W
Wally1 Offline
Old Hand
Wally1  Offline
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W
Joined: Feb 2010
Posts: 314
Wallasey
I should have mentioned that the boulder clay cliffs at Thurstaston
erode out erratic boulders stones etc. and these can be seen along
the beach below the Visitors Centre on the Wirral Way.

Re: Question for local Geologists. [Re: JonnyHill1981] #1053288
7th Mar 2018 6:42pm
7th Mar 2018 6:42pm
Joined: May 2011
Posts: 815
Greasby
G
Greenwood Online content
Wise One
Greenwood  Online Content
Wise One
G
Joined: May 2011
Posts: 815
Greasby
The link put up by DiggingDeeper looks very interesting, but Ye Gods I wish the person writing it had used paragraphs! They make text much more digestible. My (totally amateur) idea on the lack of glacial erratics on Bidston Hill is that, being a high area, it would have been scoured clear and any deposition would have been on lower-lying areas. Smaller ones lying around might later have been used for building or walling. There is a rich variety of erratics (mostly small) eroding out of the cliffs at Thurstaston, well worth exploring.


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