Dam Formation
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The Dam Formation is an Early Miocene formation located in southwestern Qatar, Saudi Arabia and the UAE.
Description
The formation was first described in a report in 1935 by Steineke and Kock. However, this report was unpublished. It was first described in published material by Powers in 1968 in Saudi Arabia, and by Cavelier in 1970 in Qatar.
The formation in Saudi Arabia and the U.A.E. was deposited in a terrestrial environment, while the formation in Qatar was deposited in a marine habitat as evidenced by the multiple marine animals found in the formation.
Fossil content
| Mammals from the Dam formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Salwasiren | S. qataernsis | ARC.2023.23.008, one associated skeleton including an incomplete cranium, mandible, left upper molar (M2), sternum, both scapulae and humeri, a partial vertebral column and ilium. ARC.2023.28.014, an incomplete left incisor | A dugongid sireanian | Lower Al-Kharrara Member | |
| Odontoceti | Indeterminate | A tooth among other remains | Lower Al-Kharrara Member |
| Fishs from the Dam formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Teleost | Indeterminate | Lower Al-Kharrara Member | |||
| Carcharhiniformes | Indeterminate | ||||
| Physodon/Scoliodon | P./S.sp. | ||||
| Aetobatus | A.arcuatus | A species of Eagle ray | |||
| Diodon | D.sp. | A species of porcupine fish |
| Reptiles from the Dam formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Testudines | Indeterminate | Lower Al-Kharrara Member | |||
| Reptillia? | Indeterminate | Lower/Middle Al-Kharrara Member |
| Molluscs from the Dam formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Ostrea | O.latimarginata | Bivalve | Lower & Middle Al-Kharrara Members | ||
| Pectinidae | Indeterminate | Scallop | |||
| Anomia | Indeterminate | Bivalve | |||
| Spondylus | |||||
| Avicula | |||||
| Clementia | C.papayracea | "Impressions and molds" | Lower, Middle & Upper Al-Kharrara Members & Abu Samrah member | ||
| Chama | C. gryphoides | ||||
| Clausinella | C.erisca | Bivalve | |||
| C. persica | |||||
| Hydrobiidae | Indeterminate | A family of fresh to brackish water snails | |||
| Chlamys | C.senatoria | Bivalve | Upper Al-Kharrara Member & Abu Samrah member | ||
| Fissurella | Indeterminate | Gastropod | |||
| Natica | |||||
| Xenophora | |||||
| Turritella | |||||
| Cerithiidae | |||||
| Conus | |||||
| Bulla | |||||
| Hydrobia | Gastropod "Very locally" found | ||||
| Potamides | |||||
| Capsa | C. lacunosa | ||||
| cf. C. fragilis | |||||
| Tellina | T. bipartita | Bivalve | |||
| Diplodonta | D.cf. rotundata | ||||
| Barbatia | B. barbata | Bivalve | |||
| Anadara | A.cf. turonica | ||||
| Cardiocardita | C.cf. monolifera | ||||
| C.aff. turonica | |||||
| Solecurtus | S. basteroti | ||||
| Timoclea | T. subspadicea | ||||
| Musculus | M.sp. | Bivalve | |||
| Eastonia | Indeterminate | ||||
| Panopea | Gastropod | ||||
| Tapes | Bivalve | ||||
| Mactra | |||||
| Lucina | |||||
| Cardium | |||||
| ?Olivella | Remains of "Internal molds" | ||||
| Voluta | |||||
| Fasciolaria | |||||
| Cassis | |||||
| Cypraea |
| Echinoderms from the Dam formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| Fibularia | F. damensis | A Sand Dollar | |||
| Agassizia | A. aff. persica | Sea urchin | |||
| Cidaris | C.sp. | Spines |
| Bryozoans from the Dam formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Material | Notes | Member | Images |
| ?Cupuladria | C. gr. haidingeri |
Crustacean remains have also been found in the formation