KI5 (Miocene of Uganda)

Also known as ETE Locality 1268, Kisegi, KI5,

Where: Uganda (1.0° N, 30.5° E: paleocoordinates 0.7° N, 29.9° E)

When: Kakara Formation (Albertine Group), Late/Upper Miocene (11.6 - 5.3 Ma)

• ETE dating method: time_unit, ETE age comment: "Kakara fm.=range~12 to ~9 Ma, based on biostrat comp of fauna"

•Lukaye et al. 2016: Greatly conflicting ages of early middle Miocene [14] and late Pliocene [13] have been suggested on the basis of palynomorph assemblages in the Turaco wells. In surface exposures, Pickford et al. [2] and Van Damme and Pickford [17] suggest Late Miocene age on the basis of molluscs associations and mammalian fossils.

Environment/lithology: fluvial; sandstone

• ETE sed env 1: fluvial, ETE sed env 2: . ETE event: ., ETE env comment: shallow-water floodplain

•Lukaye et al. 2016: The bulk of the Kakara Formation’s exposed section was deposited on a coastal plain, with the intermittent coarse ferruginous sandstones introduced by crevasse splay from nearby channels; these channels are represented by the sandstone development of the new road-cut exposure. Increasing nearshore lacustrine interbeds in the upper parts of the formation were however noted by Roller et al. [9]. The thick Turaco section suggests a development which introduced coarse deltaic clastics into the basin. Palynofacies associations suggest a shift from more open lacustrine to nearshore environments about 200 m above formational base [14] or the development of humid fan delta/mouth bar deposits throughout [13].

• ETE rock type adj: 0, ETE lithology comments: cly/slt/ironst

•Lukaye et al. 2016: Log patterns in the Turaco-3 well suggest a coarsening and shallowing upwards sequence. The section’s lowermost 57 m display coarsening upward rhythms, followed by a 185 m thick sandy section with erratic gamma ray response. This is then followed by 166 m with repetitive coarsening upward rhythms, and then 20 m of lacustrine shales. The formation is topped by interbedded sands and shales with a thickness of 104 m. In natural exposures, the much thinner 40 m development of the formation is developed as a dominantly dark claystone, with well-defined, mainly laterally continuous, thin ferruginous coarse sandstone beds. The formation’s top in exposures is marked by a 40-50 cm thick bench of conglomeratic polymictic ferruginous sandstones.

Size class: macrofossils

Collection methods: bulk

• ETE Size: macro; ETE reference list: 926, ; ETE museum list:

Primary reference: P. Tassy. 1994. Fossil proboscideans,Mammalia, from the Western Rift,Uganda. In:Geol. and palaeo. of the Albertine rift valley II:217-257 [A. Behrensmeyer/A. Behrensmeyer/M. Kosnik]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 22444: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 23.08.1999, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Mammalia
 Proboscidea - Elephantidae
Stegotetrabelodon sp. Petrocchi 1941 elephant
ETE number of identifiable specimens; species: primitive
Reptilia
 Crocodylia - Crocodylidae
"Osteolaemus cf. tetraspis" = Osteolaemus tetraspes
"Osteolaemus cf. tetraspis" = Osteolaemus tetraspes Cope 1861 crocodile