On 16/06/2013 18:48, jillery wrote:
> On Sat, 15 Jun 2013 04:11:24 -0400, jillery <
69jp...@gmail.com>
> wrote:
>
>> On Sat, 15 Jun 2013 08:54:23 +0100, alias Ernest Major
>> <{$to$}@meden.demon.co.ukl> wrote:
>>
>> [...]
>>
>>>>>> It really is a straightforward question. If you can't understand it,
>>>>>> I doubt your answer would be useful to me. Do you think "pockets of
>>>>>> infill" qualify as strata or not?
>>>>>
>>>>> I think they don't.
>>>>
>>>>
>>>> Neither do I. That means Ernest Major's pedantic point, which I
>>>> acknowledge is pedantically valid, is also inaccurate.
>>>
>>> If you are taking that position then your original statement was not
>>> unclear but wrong.
>>
>>
>> Is there some rule in T.O. which I am unfamiliar, that poster aren't
>> supposed explain themselves when they make blanket assertions?
>>
>> There is no "if". I do take that position. Now please explain how
>> that position makes my original statement wrong.
You original statement was "The organism was originally fossilized in
Cambrian stratum, and later redeposited into earlier Ediacaran stratum."
Taken literally, that statement is an invalid explanation.
I interpreted your subsequent words to mean that you were rejecting
infill as your intended meaning, which leaves us without a
scientifically valid interpretation of your original words. After
subsequent posts I recognise that you might instead be equivocating on
the meaning of stratum. Unfortunately if you reject my usage of stratum
to describe infill deposits (which can be stratified - cave deposits
often are) that leaves your references to strata equally incorrect.
>
>
> No reply. I am disappointed, especially from Ernest Major. But I'll
> go on without one.
>
> Deleted from Ernest Major's reply to me was the original question from
> the OP:
>
> "What if a fully developed trilobite was found in an early Ediacaran
> stratum?"
>
> From that, I thought it relevant to answer *how* that might come to
> be, in order to make any discussion on "what if" meaningful. One of
> the possibilities I suggested was that a preexisting trilobite fossil
> could be naturally redeposited into older, earlier Ediacaran strata.
> Note: Ernest Major identified the correct technical term for this
> mechanism as "reworked".
Actually reworked fossils occur in *younger* beds.
>
> IIUC Ernest Major's admittedly pedantic point, the OP's question
> assumes an impossible condition, that a fossil from younger strata
> literally can't be redeposited into older strata, because the reworked
> process necessarily includes material from the original, younger
> strata. So the reworked fossil is not literally *in* older strata,
> but is merely surrounded by it.
But the younger beds could be infills of older beds - such as the case
of a Devonian (Old Red Sandstone) fossil being found in Permo-triassic
(New Red Sandstone) infill in Torridonian (Oldest Red Sandstone) (I
don't think this particular instance actually occurs.)
However, you seem to be taking an unreasonably literal interpretation of
the OP's question. What I assumed that he meant was that a trilobite of
Cambrian aspect (that is morphologically similar to trilobites found in
rocks of Cambrian age) was found in Ediacaran rocks - parallelling the
case of a hypothetical fossil rabbit being found in Cambrian rocks. In
that case he has not assumed an impossible condition.
>
> I freely admit his is an interpretation I didn't consider before I
> read it. On reflection, while technically correct, ISTM including
> that distinction in this discussion at that initial stage would add
> obfuscating detail, as would most pedantic points. My purpose was to
> address the OP's question, not to give him a lecture on how he phrased
> his question. Nor was I interested in hijacking the topic into a
> discussion about reworking. So if I had to answer to answer the OP's
> question again, I would answer it similarly, despite others' bald
> assertions that my answer is unclear, inaccurate, and/or wrong.
>
> As for John Harshman and Friar Broccoli, they divined my emotional
> state based on their preconceptions, and incorrectly so, while
> ignoring evidence from my post to the contrary. IOW they "read my
> mind". This is a chronic and bad habit they share.
>
--
alias Ernest Major