Geologia Croatica, Vol. 65 No. 3, 2012.
Original scientific paper
https://doi.org/10.4154/GC.2012.24
Vein reticulation in seed ferns of the Dobrudzha coalfield Bulgaria
Yanaki Georgiev Tenchov
; Geological Institute Bulgarian Academy of Sciences
Abstract
Alethopteris, Lonchopteris, Paripteris, Linopteris and Reticulopteris are abundant pteridosperm fronds in the Pennsylvanian-age Dobrudzha Coalfield. The transition from fan-shape to reticulate veining in Lonchopteris, Linopteris and Reticulopteris and in Laveineopteris to Reticulopteris is documented. The most probable cause for this is the decrease in humidity; in addition to temperature controls on the geographic distribution. The form and positioning of anastomoses are discussed.
Keywords
Carboniferous; pteridosperms, reticulation; palaeoecology; drying; cooling
Hrčak ID:
124245
URI
Publication date:
30.10.2012.
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