| GRAPTOLITE FINE STRUCTURE |
| Reticulate fabric in graptolites |
| Graptolite Net | Graptolites & Graptoliters | Evolution of Graptolites | Cephalodiscoidea | Rhabdopleuroidea |
| _______________________________________________________________________________________________________________________ Graptolite Net edited by Piotr Mierzejewski, The Count of Calmont & Countess Maja Anna Korwin-Kossakowska 2003-2004 |
Urbanek and Mierzejewski (1984) defined the reticulate
fabric as follows:
"(i) the presence of wavy, branching or anastomosing
fibrous material of varying thickness, including gross fibres,
(ii) the reticular arrangement of fibrils and fibres to
produce an irregular meshwork, (iii) the absence of clearly
defined sheets separating indivicual layers and indistinct
layering in general, and (iv) the presence of thick, electron
dense intercalations separating entire groups of layers."
"The nature of 'reticulate fabric' remains obscure. Its
features listed above may be primary (being another
exampled of the ramarkablepolymorphism of collagen) or
secondary. In this latter case the unique features of the
'reticulate fabric' are merely a product of preservational
degradation".
________________________________________
Source:
Urbanek, A. and Mierzejewski, P. 1986. A possible new
pattern of cortical deposit in Tremadoc dendroid
graptolites from chert nodules. - Geological Society Special
Publication No. 20, 13-19.
fabric as follows:
"(i) the presence of wavy, branching or anastomosing
fibrous material of varying thickness, including gross fibres,
(ii) the reticular arrangement of fibrils and fibres to
produce an irregular meshwork, (iii) the absence of clearly
defined sheets separating indivicual layers and indistinct
layering in general, and (iv) the presence of thick, electron
dense intercalations separating entire groups of layers."
"The nature of 'reticulate fabric' remains obscure. Its
features listed above may be primary (being another
exampled of the ramarkablepolymorphism of collagen) or
secondary. In this latter case the unique features of the
'reticulate fabric' are merely a product of preservational
degradation".
________________________________________
Source:
Urbanek, A. and Mierzejewski, P. 1986. A possible new
pattern of cortical deposit in Tremadoc dendroid
graptolites from chert nodules. - Geological Society Special
Publication No. 20, 13-19.
| Reticulate fabric in Dendrograptus sp. from the upper Tremadoc of Wysoczki, Poland. |