[meteorite-list] getting oriented on orientation

From: bobe5531 at comcast.net <bobe5531_at_meteoritecentral.com>
Date: Wed, 05 Mar 2008 17:59:46 +0000
Message-ID: <030520081759.10523.47CEDF92000C45200000291B2205886172CECCCACA0A0D010D_at_comcast.net>

Great Idea,

We have weathering grades and this should be just as simple.
Im currently busy w/ business at my desk but will add my thoughts regarding the parameters of grading later today.
This seems long overdue to me.

Bob E.
 -------------- Original message ----------------------
From: Darryl Pitt <darryl at dof3.com>
>
> topic: grading system for orientation
>
> just trying to get things started off here.
>
> i don't believe there should be 10-grades of orientation, as was
> suggested, as it seems too broad and results in a situation that is
> similar to the one before us: the too-liberal invocation of the
> term. might i suggest a scale of O1-O4 or perhaps to O5 at the most.
>
> it would seem the determination of the extent of orientation should
> be based on the presence of a number of specific characteristics and
> the extent to which such characteristics are manifest. i beseech the
> input of scientists who are expert in eliminating the ambiguities in
> such a grading system.
>
> let's start with some characteristics of orientation that come to
> mind....
>
> evidence of ablation
> presence of flow lines/rivulets
> flow lines radiating in all directions off a single coordinate
> elongated parallel regmaglypts radiating off a single coordinate
> distinctly different morphologies of the obverse and reverse
> evidence of bubbling in the low-pressure zone (reverse)
> parabolic curvature of lead face (including small parabolas at tip of
> oriented "bullets")
> "lipped" edges and evidence of molten material having ablated over
> the edge of such lips
>
>
> please add or subtract to the list. maybe some characteristics
> should be weighted more than others and then there is the quandary of
> quantifying the extent of such characteristics.
>
> i hope this helps to start things off. and i hope we're able to get
> this resolved and get....oriented on orientation.
>
> all best / d,
>
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Received on Wed 05 Mar 2008 12:59:46 PM PST