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7. INYERTEBRATE fCHNOLOGY OF CONTINENTAL FRESHWATER ENYIRONMENTS

Beaconites -Taenidium Ichnofabric

A

Emplacement in abandoned channels, ovorbank areas and lakę margint (Softground)

Scoyenia

Ichnofabric

Emplacement in deslccated ponds and lakę marglns (Firmground)

Composite Beaconites -Taenidium * Scoyenia Ichnofabric

C

Suitę replacement due to progressive dessication of water body (Softground to Firmground)

Skolithos Ichnofabric

F

Colonization of active fluvial channels

Colonization in lacustrine delta mouth bars and distributary channels

Colonization in lacustrine tempestites

Camborygma Ichnofabric

Fuersichnus

Ichnofabric

Planolites

Ichnofabric

G

H

Emplacement in areas of high water table

Emplacement in areas of Iow and/or fluctuation water table

Establishment of a deposit feeding infauna in ephemeral fluvial and lacustrine environment

Establishment of a deposit feeding infauna in ponds and lakes

FIGURĘ 17.5 Icons of most common Continental freshwater ichnofabrics and their environ-mental implications. (A) Beaconites-Tiienidium ichnofabric. (B) Scoyenia ichnofabric. (C) Composite Beaconltes-Taenldluiri / Scoyenia ichnofabric. (D-F) Vnriants of Skolithos ichnofabric, reflecting colonization in different freshwater sottings. (G-H) Variants of Ciunborygina ichnofabric, reflecting different positions of the water table. (I) Fuersichnus ichnofabric. (J) Planolites ichnofabric. See text for explanation.