paleonet Tentaculitids

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Dear paleonetters,

some question from one of my fellow PhD students here at Leuven
University (Belgium), he is doing research in the Palaeozoic of the
Jebilet  northeast of Marrakech (Morocco) upon a complex tectonic
setting with mainly Ordovician to Carboniferous strata. Within the
contact zone  there are limestones with small cone shaped fossils (mm
reach). We possibly interpreted them as tentaculitids or Hyolitha.
Similar rocks from this area have been reported in literature (Huvelin,
1977), and are considered to be Devonian in age. However, apart from the
similar lithology we don't have any data confirming this Devonian age.
Also, their depositional environment remains problematical because of
the proximity of limestones from very shallow environments.

So we are seeking for help! Can someone give us more information upon
these weard cone shaped fossils, Are these tentaculitids (or something
else?), could they say something about the age of these deposits (even
rudimentary), and can they only been found within deep marine settings
(as has been postulated in literature)?
We posted some pics of the thin sections on the web: with following
adress:  http://www.student.kuleuven.ac.be/~m9612747
for scale: the view of Tenta02-248.jpg - Tenta06-263.jpg are 4.3mm wide,
Tenta08-263.jpg - Tenta11-263x.jpg are 1.38mm wide.

You may reply to paleonet or to him personally at:
matsen.broothaers@geo.kuleuven.ac.be

ThXs already!

Stijn Goolaerts
IWT research assistant
Department of Geology & Geography
KU LEUVEN
BELGIUM