Paul I see what you are saying but it doesn't take into account depression of the land surface under the weight of ice and the isostatic adjustment after the ice retreats. In any case, I have found a study that has modeled sea level change for Ireland and the Irish Sea. I do not have access to the Figures for some reason but it appears to conclude that the southern bridge was the only one that existed and that there has been no land bridge between Ireland and Britain since about 14000 years ago. http://findarticles.com/p/articles/mi_qa3721/is_199611/ai_n8743782/?tag=cont ent;col1 It looks like a pretty careful study so unless there are some holes in it, it appears that I have my answer and that a northern land bridge could not have been important since it probably didn't exist. Thanks. John -----Original Message----- From: dna-r1b1c7-bounces@rootsweb.com [mailto:dna-r1b1c7-bounces@rootsweb.com] On Behalf Of Paul Conroy Sent: October-07-11 2:29 PM To: dna-r1b1c7@rootsweb.com Subject: Re: [R-M222] Location of land bridge between Scotland and Ireland John, Look at the map carefully, when the North Eastern "ice-bridge" was it effect it barely touched Inisowen, but was concentrated in the Antrim/Down corridor to the nearest parts of Scotland. Sea levels were at their lowest at this time, and if there is no ice bridge going to Inishowen, then there can't have been a land bridge later as the ice began to melt, right?! But, like I said it's irrelevant anyway - unless people feel that R-M222 is 7,000-10,000 years old or more?? Cheers, Paul On Fri, Oct 7, 2011 at 2:21 PM, John Carey <johnca@quickclic.net> wrote: > Paul > > I'm afraid that this link is of little help. The land bridge on the > map is from southern Ireland to southern England and was essentially > destroyed > 12000 years ago when the Irish Sea flooded. Ulster was still under > ice then. > > I can't find a reference to a later land bridge between County Down > and Scotland and I'm confused as to how it could have existed if a 200 > metre deep trench lay in between. A link between Inishowen to Islay > as suggested by Iain's message is much more plausible since it would > involve the shallower portion of the North Channel. If it really > existed, it would be nice to have a scientific opinion at to its dates > before we conclude it is irrelevant. > > John > > -----Original Message----- > From: dna-r1b1c7-bounces@rootsweb.com > [mailto:dna-r1b1c7-bounces@rootsweb.com] On Behalf Of Paul Conroy > Sent: October-07-11 1:08 PM > To: dna-r1b1c7@rootsweb.com > Subject: Re: [R-M222] Location of land bridge between Scotland and > Ireland > > Ian, > > There's a rough map of the Land Bridge here: > > http://www.wesleyjohnston.com/users/ireland/past/pre_norman_history/ic > eage.h > tml > > My point was that the land bridge was irrelevant, this was one > breeding population, sharing the same culture and language > > R-M222 came much later, and probably from the Continent, and if I'm > correct probably came in more than one stream to Ireland, as Southern > and Eastern > R-M222 may not be related closely to the main body of Northern R-M222. > > Cheers, > Paul > > On Fri, Oct 7, 2011 at 12:49 PM, Iain Kennedy > <ikennedy_msdn2@hotmail.com>wrote: > > > > > Paul, > > That's what I thought too. I flipped through Bardon just now and he > > says on > > p4 > > > > 'although rising sea levels had severed Ireland from Britain - the > > last land bridge is thought to have run from Inishowen to Islay - > > geologically they remained closely linked, especially in Ulster'. > > The claim is not referenced unfortunately. Has anyone come across > > any such claim before? > > Iain > > > > > > > > > R1b1c7 Research and Links: > > http://clanmaclochlainn.com/R1b1c7/ > ------------------------------- > To unsubscribe from the list, please send an email to > DNA-R1B1C7-request@rootsweb.com with the word 'unsubscribe' without > the quotes in the subject and the body of the message > R1b1c7 Research and Links: http://clanmaclochlainn.com/R1b1c7/ ------------------------------- To unsubscribe from the list, please send an email to DNA-R1B1C7-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message

John, I agree - good link. Cheers, Paul On Fri, Oct 7, 2011 at 3:01 PM, John Carey <johnca@quickclic.net> wrote: > Paul > > I see what you are saying but it doesn't take into account depression of > the > land surface under the weight of ice and the isostatic adjustment after the > ice retreats. > > In any case, I have found a study that has modeled sea level change for > Ireland and the Irish Sea. I do not have access to the Figures for some > reason but it appears to conclude that the southern bridge was the only one > that existed and that there has been no land bridge between Ireland and > Britain since about 14000 years ago. > > http://findarticles.com/p/articles/mi_qa3721/is_199611/ai_n8743782/?tag=cont > ent;col1 > > It looks like a pretty careful study so unless there are some holes in it, > it appears that I have my answer and that a northern land bridge could not > have been important since it probably didn't exist. > > Thanks. > > John > > > -----Original Message----- > From: dna-r1b1c7-bounces@rootsweb.com > [mailto:dna-r1b1c7-bounces@rootsweb.com] On Behalf Of Paul Conroy > Sent: October-07-11 2:29 PM > To: dna-r1b1c7@rootsweb.com > Subject: Re: [R-M222] Location of land bridge between Scotland and Ireland > > John, > > Look at the map carefully, when the North Eastern "ice-bridge" was it > effect > it barely touched Inisowen, but was concentrated in the Antrim/Down > corridor > to the nearest parts of Scotland. Sea levels were at their lowest at this > time, and if there is no ice bridge going to Inishowen, then there can't > have been a land bridge later as the ice began to melt, right?! > > But, like I said it's irrelevant anyway - unless people feel that R-M222 is > 7,000-10,000 years old or more?? > > Cheers, > Paul > > On Fri, Oct 7, 2011 at 2:21 PM, John Carey <johnca@quickclic.net> wrote: > > > Paul > > > > I'm afraid that this link is of little help. The land bridge on the > > map is from southern Ireland to southern England and was essentially > > destroyed > > 12000 years ago when the Irish Sea flooded. Ulster was still under > > ice then. > > > > I can't find a reference to a later land bridge between County Down > > and Scotland and I'm confused as to how it could have existed if a 200 > > metre deep trench lay in between. A link between Inishowen to Islay > > as suggested by Iain's message is much more plausible since it would > > involve the shallower portion of the North Channel. If it really > > existed, it would be nice to have a scientific opinion at to its dates > > before we conclude it is irrelevant. > > > > John > > > > -----Original Message----- > > From: dna-r1b1c7-bounces@rootsweb.com > > [mailto:dna-r1b1c7-bounces@rootsweb.com] On Behalf Of Paul Conroy > > Sent: October-07-11 1:08 PM > > To: dna-r1b1c7@rootsweb.com > > Subject: Re: [R-M222] Location of land bridge between Scotland and > > Ireland > > > > Ian, > > > > There's a rough map of the Land Bridge here: > > > > http://www.wesleyjohnston.com/users/ireland/past/pre_norman_history/ic > > eage.h > > tml > > > > My point was that the land bridge was irrelevant, this was one > > breeding population, sharing the same culture and language > > > > R-M222 came much later, and probably from the Continent, and if I'm > > correct probably came in more than one stream to Ireland, as Southern > > and Eastern > > R-M222 may not be related closely to the main body of Northern R-M222. > > > > Cheers, > > Paul > > > > On Fri, Oct 7, 2011 at 12:49 PM, Iain Kennedy > > <ikennedy_msdn2@hotmail.com>wrote: > > > > > > > > Paul, > > > That's what I thought too. I flipped through Bardon just now and he > > > says on > > > p4 > > > > > > 'although rising sea levels had severed Ireland from Britain - the > > > last land bridge is thought to have run from Inishowen to Islay - > > > geologically they remained closely linked, especially in Ulster'. > > > The claim is not referenced unfortunately. Has anyone come across > > > any such claim before? > > > Iain > > > > > > > > > > > > > > > R1b1c7 Research and Links: > > > > http://clanmaclochlainn.com/R1b1c7/ > > ------------------------------- > > To unsubscribe from the list, please send an email to > > DNA-R1B1C7-request@rootsweb.com with the word 'unsubscribe' without > > the quotes in the subject and the body of the message > > > R1b1c7 Research and Links: > > http://clanmaclochlainn.com/R1b1c7/ > ------------------------------- > To unsubscribe from the list, please send an email to > DNA-R1B1C7-request@rootsweb.com with the word 'unsubscribe' without the > quotes in the subject and the body of the message > > > R1b1c7 Research and Links: > > http://clanmaclochlainn.com/R1b1c7/ > ------------------------------- > To unsubscribe from the list, please send an email to > DNA-R1B1C7-request@rootsweb.com with the word 'unsubscribe' without the > quotes in the subject and the body of the message >