Register | Sign In


Understanding through Discussion


EvC Forum active members: 55 (9171 total)
0 online now:
Newest Member: Neptune7
Post Volume: Total: 917,386 Year: 4,643/9,624 Month: 418/1,096 Week: 13/110 Day: 0/6 Hour: 0/0


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   The Light Time Problem
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


Message 258 of 278 (899224)
10-10-2022 8:44 PM
Reply to: Message 36 by dwise1
04-16-2022 4:01 PM


dwise1 writes:
Radiometric dating on rock is how long ago it solidified from being molten.
Radiometric dating cannot be performed on sedimentary rock since it is ground down and recycled older rock, so radiometric dating would just get the age of bit of old rock tested. However, we can tell which layers are older than others by the order in which they are stacked. We can also establish dates for layers from igneous intrusions which bracket them in. Therefore we can determine the age of a particular layer.
But the sedimentary rock could be much younger than the surrounding igneous rock.
A flood could leave a sedimentary layer-cum-rock around some igneous rocks millions-billions of years after said igneous rocks were formed.

This message is a reply to:
 Message 36 by dwise1, posted 04-16-2022 4:01 PM dwise1 has not replied

Replies to this message:
 Message 259 by ringo, posted 10-10-2022 10:12 PM Dredge has replied

  
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


Message 261 of 278 (899313)
10-11-2022 8:15 PM
Reply to: Message 259 by ringo
10-10-2022 10:12 PM


ringo writes:
How do you figure a sedimentary layer managed to sneak UNDER an older igneous layer?
Between the sedimentary layer that contains a fossil and the igneous layer below could be hundreds of meters of other sedimentary rock layers ... which means that fossil-layer could have formed a very long time after the igneous layer.
But I guess general geological patterns emerge, which is where index fossils come into play.

This message is a reply to:
 Message 259 by ringo, posted 10-10-2022 10:12 PM ringo has replied

Replies to this message:
 Message 262 by ringo, posted 10-11-2022 10:22 PM Dredge has not replied
 Message 263 by dwise1, posted 10-11-2022 10:42 PM Dredge has replied

  
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


(1)
Message 264 of 278 (899324)
10-11-2022 11:05 PM
Reply to: Message 263 by dwise1
10-11-2022 10:42 PM


Believe it or not, I'm not an expert in geology or atomic dating, so thank you for the information.

This message is a reply to:
 Message 263 by dwise1, posted 10-11-2022 10:42 PM dwise1 has replied

Replies to this message:
 Message 265 by dwise1, posted 10-11-2022 11:42 PM Dredge has replied

  
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


Message 266 of 278 (899381)
10-12-2022 10:09 PM
Reply to: Message 265 by dwise1
10-11-2022 11:42 PM


dwise1 writes:
Since sedimentary layers (of which I was seeing a lot) consists of older rock that had been ground up and recycled, exactly how are they dated?
I mean, if you date them directly, then you should get a much older age because they consist of much older rock, right?
Right. Furthermore, I imagine sedimentary rock could contain a mish-mash of particles of vastly varying ages - for example, some particles could be only thousands of years old while other particles could be billions of years old.

This message is a reply to:
 Message 265 by dwise1, posted 10-11-2022 11:42 PM dwise1 has replied

Replies to this message:
 Message 267 by AZPaul3, posted 10-12-2022 10:21 PM Dredge has replied
 Message 268 by Tanypteryx, posted 10-12-2022 10:30 PM Dredge has replied
 Message 270 by dwise1, posted 10-13-2022 2:01 AM Dredge has replied

  
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


Message 269 of 278 (899394)
10-13-2022 1:49 AM
Reply to: Message 267 by AZPaul3
10-12-2022 10:21 PM


AZPaul3 writes:
So now that you know you are wrong about the particle mix how does this change things?
I don't know⁶.

This message is a reply to:
 Message 267 by AZPaul3, posted 10-12-2022 10:21 PM AZPaul3 has replied

Replies to this message:
 Message 275 by AZPaul3, posted 10-13-2022 10:53 AM Dredge has not replied

  
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


(1)
Message 271 of 278 (899396)
10-13-2022 3:12 AM
Reply to: Message 270 by dwise1
10-13-2022 2:01 AM


Thanx for the information. Very interesting.
No YEC claim will be forthcoming.

This message is a reply to:
 Message 270 by dwise1, posted 10-13-2022 2:01 AM dwise1 has replied

Replies to this message:
 Message 273 by dwise1, posted 10-13-2022 3:28 AM Dredge has replied

  
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


(1)
Message 272 of 278 (899397)
10-13-2022 3:13 AM
Reply to: Message 268 by Tanypteryx
10-12-2022 10:30 PM


Okay ... thank you. It's all rather fascinating.

This message is a reply to:
 Message 268 by Tanypteryx, posted 10-12-2022 10:30 PM Tanypteryx has not replied

  
Dredge
Member (Idle past 136 days)
Posts: 2850
From: Australia
Joined: 09-06-2016


Message 274 of 278 (899405)
10-13-2022 6:16 AM
Reply to: Message 273 by dwise1
10-13-2022 3:28 AM


When I become a grown-up I might be a geologist.

This message is a reply to:
 Message 273 by dwise1, posted 10-13-2022 3:28 AM dwise1 has not replied

  
Newer Topic | Older Topic
Jump to:


Copyright 2001-2023 by EvC Forum, All Rights Reserved

™ Version 4.2
Innovative software from Qwixotic © 2024