Tiny Life: Photo Evidence of Early Animals

Tacuarí trace fossils

Photograph of the Tacuarí trace fossils, illustrating typical bilobate and sinuous trails.

Photograph of the Tacuarí trace fossils, illustrating typical bilobate and sinuous trails.

Photograph of the Tacuarí trace fossils, illustrating typical bilobate and sinuous trails.

Detail of the rhythmites, showing the repetitive fine sand and silt-clay layers. Note also the presence of small dropstones (top left of the coin).

Photograph of the outcrops, showing the trace fossil-bearing rhythmites.

Photograph of the outcrops, showing the trace fossil-bearing rhythmites.

General view of the study area, showing outcrops of the Tacuarí Formation (northeast Uruguay).

General view of the study area, showing outcrops of the Tacuarí Formation (northeast Uruguay).