view:22913 Last Update: 2021-2-24
Miocene bird track and take-off imprints in the Upper Red Formation, western Mushampa, northwest Zanjan [in Persian with English abstract].
اثر فسيل حركت و برخاستن (take off) پرندگان زمان ميوسن در رسوبات سازند سرخ بالايي، برش غرب روستاي مشمپا، شمال باختري زنجان
Numerous bird’s footprints have been found in the Upper Red Formation in western Mushampa village (100 km western Zanjan). Two specimens related to tetradactyl Antarctichnus, contain special track and tack off imprints. Birds walked with draging middle digit (digit III) on the sediments, which left as long furrow between footprints. Drag marks are in the tack off imprints, and some of them, however end to a circular hollow. These footprints are interpreted as running-leaping tack off model, on the other hand, birds have run at first, and have used foot pressure for leap in the point of tack off.