kosmonooit Posted August 25, 2016 Share Hahahaha. I have always been facinated by geology. It was a bonus to date a geologist. I nag her about stuff constantly. I have had her drive me all over Joburg with the PH.D. Friend and had them explain it all to me. The thing I wrote above is a bit misleading where I say it's all sedimentary metamorphic. That applies only to the wits group. The andesite is obviously not sedimentary and not part of the wits group. Most of the it must be the Andesite (which is listed as extrusive igneous, volcanic rock) though it was kinda brown last time I looked. Any idea how old that is? or when it happened? before or after the Vredefort big bang? I haven't seen much sedimentary, though there is some on the eastern side in the low lands if remember correctly< i think I need another visit its been a while. Though taking of a big turn of the pedals, looking forward to the Crater Cruise, love that area, immensely interesting geologically speaking,. Edited August 25, 2016 by kosmonooit Link to comment Share on other sites More sharing options...
F.K Posted August 25, 2016 Share Please be careful especially the new guys there is a couple of fast sections and lots of sharp turns Link to comment Share on other sites More sharing options...
HappyMartin Posted August 25, 2016 Share Most of the it must be the Andesite (which is listed as extrusive igneous, volcanic rock) though it was kinda brown last time I looked. Any idea how old that is? or when it happened? before or after the Vredefort big bang? I haven't seen much sedimentary, though there is some on the eastern side in the low lands if remember correctly< i think I need another visit its been a while. Though taking of a big turn of the pedals, looking forward to the Crater Cruise, love that area, immensely interesting geologically speaking,. Most of its in fact quartzite. Very hard. That's from the Wits group. The Andesite weathers to a brown. You can see the color where it's freshly broken. The Wits group was put down in a kind of shallow inland sea before the Vredefort impact. It's why the Wits layers are all so steeply angled. As I understand it Joburg is on the edge of the crater. I think the Andesite was just after the impact. OK so here are the dates roughly I think. Wits group put down between 3 billion to 2.7 billion years. Vredefort impact 2 billion. Ventersdorp 2.7 to 2.6. Amazing really. nonky 1 Link to comment Share on other sites More sharing options...
kosmonooit Posted August 25, 2016 Share Thanks for the info, this kinda puts the impact crater into perspective. The Magaliesburg are also part of it nonky 1 Link to comment Share on other sites More sharing options...
Matuka Posted August 26, 2016 Share Another question I have, is the picnic area which is halfway around the course a safe place for families? My wife and very little kids want to come out for the day but I just dont know if its safe for them out there as its quite isolated. Yes I'm a bit paranoid hahaha! Edited August 26, 2016 by Matuka Link to comment Share on other sites More sharing options...
Jay_B Posted August 26, 2016 Share Another question I have, is the picnic area which is halfway around the course a safe place for families? My wife and very little kids want to come out for the day but I just dont know if its safe for them out there as its quite isolated. Yes I'm a bit paranoid hahaha! Dont see why not, havent heard of any trouble in SBR as a whole.There is normally a few people at that same picnic spot as well, otherwise if it makes you feel better the picnic spots at the Northern entrance has always got people there. F.K and Matuka 2 Link to comment Share on other sites More sharing options...
Matuka Posted August 26, 2016 Share Dont see why not, havent heard of any trouble in SBR as a whole.There is normally a few people at that same picnic spot as well, otherwise if it makes you feel better the picnic spots at the Northern entrance has always got people there. Great thanks! Link to comment Share on other sites More sharing options...
mr_stig Posted August 26, 2016 Share Dont see why not, havent heard of any trouble in SBR as a whole.There is normally a few people at that same picnic spot as well, otherwise if it makes you feel better the picnic spots at the Northern entrance has always got people there. Years ago we hiked and picnicked there and I didn't feel unsafe. Edited August 26, 2016 by mr_stig Link to comment Share on other sites More sharing options...
Grey Hubs Posted August 29, 2016 Share SBR on Saturday...hard as usual with a bit of wind. Enjoyed the ride. Was good to see a few riders sharing the suffering! GSG and HappyMartin 2 Link to comment Share on other sites More sharing options...
Veebee Posted August 29, 2016 Share SBR on Saturday...hard as usual with a bit of wind. Enjoyed the ride. Was good to see a few riders sharing the suffering! I will be there this coming Saturday for some suffering. First time so just going to cruise around there. Link to comment Share on other sites More sharing options...
ahmedbadat Posted August 29, 2016 Share I will be there this coming Saturday for some suffering. First time so just going to cruise around there.will also be there this saturday Link to comment Share on other sites More sharing options...
Baaisikilist Posted August 29, 2016 Share I will be there this coming Saturday for some suffering. First time so just going to cruise around there.Haha... "Cruise" and "Suikers" in one sentence. Funny guy... Richard29, Joe Low, Escapee.. and 2 others 5 Link to comment Share on other sites More sharing options...
Richard29 Posted August 29, 2016 Share I will be there this coming Saturday for some suffering. First time so just going to cruise around there.1st time? cruise ? Grey Hubs 1 Link to comment Share on other sites More sharing options...
Veebee Posted August 29, 2016 Share haha yeah I mean take it easy so I don't fall off dead before completing a loop Link to comment Share on other sites More sharing options...
Fat Boab Posted August 29, 2016 Share haha yeah I mean take it easy so I don't fall off dead before completing a loop In order to avoid falling off, through lack of momentum, one has to approach death at SBR! All just scare-mongering really! Just don't be put off by the first few kms, and keep plenty in the tank for the 40+ km mark..... Veebee 1 Link to comment Share on other sites More sharing options...
Matuka Posted August 29, 2016 Share I had a great ride on Sunday. First timer so it wasnt really great it was painful as hell! But overall I really enjoyed it. Saw some friendly riders out there but also some not so friendly ones. I overtook a couple on MTBs on a hill and gave a cheery (or what I thought was cheery) hello. I just got stared at and ignored. Was on the road a bit further up sorting out a mechanical and they both rode passed without saying a word. They just shared a laugh. Not sure what etiquette is on the road but I assumed it was like running when you greet each other? Doesnt really matter though it was a great day I'll be out there again! F.K 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now