Eighteen samples were collected from outcrop along the north bank of the Neales River in the Eromanga Basin, as part of the mapping programme for the WARRINA 1:250 000 map sheet. Where palynological dating was possible the sediments were found to range in age from the Crybelosporites striatus Zone of Helby et al. (1987) to the lowermost Appendicisporites distocarinatus Zone. A number of samples were barren of palynomorphs. The age range of the sediments along the north bank of the Neales River is thus from latest Aptian to latest Albian (Early Cretaceous). On the basis of the lithologies present and the palynological dates, the Mesozoic units outcropping along the river are the middle to upper part of the Bulldog Shale, plus Coorikiana Sandstone, Oodnadatta Formation and Mackunda Formation. The dates further indicate that a unit mapped as Winton Formation near the junction of Brown Creek and the Neales River on LAKE EYRE sheet may be Oodnadatta Formation, and, further upstream along the Neales, an area mapped as Oodnadatta Formation is Mackunda Formation. A number of the palynological dates support evidence of faulting along the Neales River lineament and possibly other northerly trending lineaments. Microplankton diversities indicate that open marine conditions prevailed in the middle to upper part of Bulldog Shale, regressive conditions in the uppermost Bulldog Shale and Coorikiana Sandstone, marginal marine conditions in the lower part of Oodnadatta Formation and regressive conditions in the Mackunda Formation. These transgressive and regressive events are correlative with basin-wide sea level events in the Albian. As is found in many other parts of the Eromanga Basin, the best samples for palynological analysis from outcrop are the limestone concretions within the Mesozoic shales. Samples of shale are normally too weathered and contain only vitrinite and plant cuticle.