Also known as LACM localities 6906, 6902, and 3185; Aliso Creek; El Lazo Road
Where: Orange County, California (33.6° N, 117.7° W: paleocoordinates 33.1° N, 115.2° W)
• coordinate stated in text
• local area-level geographic resolution
When: Monterey Formation, Tortonian to Tortonian (11.6 - 5.3 Ma)
• Domning (1978) indicates this collection is latest Miocene-early Pliocene, but Barnes et al., 1985 state it is approximately 10 Ma.
•In Southern California the Monterey Formation ranges from the mid Langhian to earliest Messinian (14.9 – 7.1 Ma) [16–18]. Microfossils (diatoms and silicoflagellates) recovered from LACM Loc. 6901, a diatomaceous unit that is stratigraphically below Loc. 6902 , are part of the lower Thalassiosira antiqua Subzone a, which ranges from 8.5 to 7.7 Ma . This gives LACM Loc. 6902 an age between 8.5 and 7.1 Ma (late Tortonian–earliest Messinian ) (Velez-Juarbe & Valenzuela-Toro, 2019).
• formation-level stratigraphic resolution
Environment/lithology: basinal (); yellow sandstone and gray shale
•LACM locality 6902 "in coarse yellow sand overlying laminated gray shale"
•LACM locality 3185 "in coarse yellow sand"
Size class: macrofossils
Reposited in the LACM
Collection methods: surface (float),
• Bird fossils described in this paper are LACM specimens and derive from LACM localities previously in Laguna Niguel. Associated with marine mammals.
Primary reference: H. Howard. 1976. A new species of flightless auk from the Miocene of California (Alcidae: Mancallinae). Smithsonian Contributions to Paleobiology 27:141-146 [J. Hunter/J. Hunter/M. Uhen]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 13300: authorized by John Hunter, entered by John Hunter on 19.02.2002, edited by Mark Uhen
Creative Commons license: CC BY (attribution)