The Lower Ju ras sic (Hettangian-Sinemurian) con ti nen tal de pos its of the Mehadia area (Caraê-Severin County) be long to the Presacina Ba sin, Up per Danubian Units of the South Carpathians, Ro ma nia. This un-named suc ces sion is ex posed along large ar eas within the Greaïca Quarry where de pos its of a com plex braided river sys tem can be seen. Nine clastic facies are iden ti fied within the Mehadia sec tion and grouped into two fa cies as so ci a tions re flect ing two main sub-en vi ronments. (A) a fine-grained as so ci a tion, up to 6.5 m thick, com posed of grey ish black and dark grey mas sive and hor i zon tally lam i nated mudstones interbedded with fine-to me dium-grained sand stones show ing rip ple lam i na tion, tab u lar low-an gle large-scale cross-bed ding and in some places mas sive sand stones. Within this as so ci a tion coars en ing and fin ing-up ward se quences are vis i ble, while sub or di nate pensymmetrical-like se quences were ob served. The sed i ments of the fine-grained as so ci a tion are in ter preted as hav ing been de pos ited along an al lu vial plain from flood wa ters. The sand stone interbeds are in ter preted as cre vasse chan nel-fills and the thin ner sand stone bod ies as prox i mal cre vasse splays. (B) a coarse-grained facies as so ci a tion rep re sented by sand stones and con glom er ates, both clast-and ma trix-sup ported, from gran ule to peb ble clast sizes. Al most all basal mem bers of this as so ci a tion are un der lain by ero sional sur faces, while in ter nal ero sional surfaces oc cur at some lev els. The coarse-grained fa cies as so ci a tion is in ter preted as hav ing been de pos ited within ac tive river chan nels of a sandy braided river sys tem. The oc cur rence of nu mer ous ero sional sur faces, the re cur rence of the fa cies within this as so ci a tion (chan nel bod ies), as well as the abun dant mudstone and sand stone intraclasts all point to fre quent con di tions of ero sion (in clud ing redeposition) of pre vi ously de pos ited sed i ments. The rel a tively low fine-grained sed i ment con tent (<25%) can be ex plained by two fac tors: (1) a cre ation rate for ac com mo da tion space was not enough for the ac cumu la tion of a large amount of overbank de pos its; (2) a lack of larger quan ti ties of fine-grained ma te rial be ing trans ported in the river sys tem. Both fac tors may have op er ated in de pend ently or in ter acted.