Kemik Sandstone

Unit symbol: Kke
Age range Lower Cretaceous, Hauterivian (132.9 to 129.4 Ma)
Lithology: Sedimentary
Group name: Kemik Sandstone
Very fine- to fine-grained, light- to medium-gray quartzose sandstone exposed in the northern foothills of the Brooks Range and correlated with discontinuous sandstone bodies known in the subsurface of the North Slope (Mull, 1987). Unit is thought to represent a high-latitude barrier island complex (Mull, 1987), in part on the basis of paleoenvironmental interpretations of fossils in the unit (R.C. Allison, Univ. of Alaska, Fairbanks, cited in Mull, 1987). Originally defined as part of the now abandoned Ignek Formation of Jurassic age, it was later placed in the Kongakut Formation (Detterman and others, 1975) and then raised to formation status by Mull (1987). Locally it remains mapped as a member of the Kongakut Formation (Molenaar and others, 1987, Mull, 1987). It has been correlated with the basal part of the Mount Goodenough Formation in the Yukon (Mull, 1987) and with the Pebble shale unit is considered the upper part the Ellesmerian sequence of northern Alaska (Moore and others, 1994). As it has not generally been distinguished from the Kongakut Formation on most published maps, its distribution is likely to be somewhat wider than shown here

Source map information

Source map Reiser, H.N., Brosge, W.P., Dutro, J.T., Jr., and Detterman, R.L., 1971, Preliminary geologic map, Mt. Michelson quadrangle, Alaska: U.S. Geological Survey Open-File Report 71-237, 2 sheets, scale 1:200,000.
Symbol Ki
Unit name Ignek Sandstone
Description Subgraywacke and arenaceous sandstone; chert-and quartz-pebble conglomerate; thin to medium beds; weathers gray to reddish brown. Probably equivalent to Kemik sandstone.
Lithology Sedimentary

Correlated geologic units

Label Kke
Description Kemik Sandstone of northeast Alaska (Kok, SG002; Kke, ML002)
Geologic age Hauterivian
Geologic setting Sedimentary, deltaic-and-nearshore
Lithology Form Importance
Quartzose-sandstone < Sandstone < Clastic < Sedimentary Bed Major