On 2/21/2015 9:49 AM, Karlynn Morgan wrote:
> David, the process depends on what you're screening for.
* working with freshwater material, I find that you've got to adapt your
methods to each different sample to do whatever concentrates the shells
- coarse sieving to pick out the macro shells from the residue, fine
sieving to remove dust, floating in water to get rid of mineral
sediment, and lots of shaking and puffing to get the shells concentrated
out of the bulk of the sample - Aleta describes a bit of the processing
of a sample in
http://karstaddailypaintings.blogspot.ca/2015/01/rideau-crossing-oil-on-canvas-12-x-16-in.html
fred.
====================================================
> In your case,
> collecting micros, you would let the smaller material fall into a bucket
> or pan and the larger material stays in the sieve. You can sort through
> this material in the sieve if you like or simply discard it. As your
> mesh sieve gets finer and finer it becomes more difficult to manage your
> "leavings" and not lose any small shells. I have found it's always
> helpful to do this at a calm shoreline with a good supply of containers
> and more than one bucket.
> Good Luck
> Karlynn
> NC - USA (lots of white stuff still on the ground)
>
> On 2/21/2015 12:03 AM, David Kirsh wrote:
>> I'm going on vacation soon and will be in search of micros as usual. While I've got my customary habits of hunkering down at the drift line or taking bags of drift for later sorting, I've never learned quite how to do screening. I'm trying to picture the procedure at the shoreline. Am I allowing the finer stuff to fall in a bucket...or a smaller mesh screen with a hard surface underneath it? What's used to catch the finer material?
>> Also, someone had recommended a cheap, good quality set of nested screens but I couldn't find it by searching in the archives.
>>
>> Thanks for any info you can filter to me,
>>
>> David Kirsh
>> Durham, NC
>>
>> Sent from my iPhone
>> ----------------------------------------------------------------------
>> [log in to unmask] - a forum for informal discussions on molluscs
>> To leave this list, click on the following web link:
>> http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
>> Type your email address and name in the appropriate box and
>> click leave the list.
>> ----------------------------------------------------------------------
>>
>
> ----------------------------------------------------------------------
> [log in to unmask] <mailto:[log in to unmask]> - a forum for
> informal discussions on molluscs To leave this list, click on the
> following web link:
> http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1 Type your email
> address and name in the appropriate box and click leave the list.
> ----------------------------------------------------------------------
--
------------------------------------------------------------
Frederick W. Schueler & Aleta Karstad
Daily Paintings - http://karstaddailypaintings.blogspot.com/
Vulnerable Watersheds - http://vulnerablewaters.blogspot.ca/
Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
------------------------------------------------------------
----------------------------------------------------------------------
[log in to unmask] - a forum for informal discussions on molluscs
To leave this list, click on the following web link:
http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
Type your email address and name in the appropriate box and
click leave the list.
----------------------------------------------------------------------
|
