A BTM Aquincumi Múzeumának ásatásai és leletmentései 2002-ben (Aquincumi Füzetek 9. Budapest, 2003)

Régészeti és földtani kutatások Soroksár határában (Horváth Zoltán — Mindszenty Andrea - Reményi László - Zádor Judit)

lehetnek. Ezek a fonnák gazdag biológiai tevékenységet jeleznek. A 4. árokban bőséges karbonátkiválást észleltünk egvkori gyökér mentén (rhizokonkréció), amely belül üreges. (5. kép) Ilyen konkréciók akkor alakulnak ki, amikor a száraz éghajlat miatt, a S. kép: Bőséges karbonátkiválás egykori gyökér mentén (rhizokonkréció), amely belül üreges (délkeleti terület, 4. árok). Ilyen konkréciók akkor alakulnak ki, amikor a száraz éghajlat miatt, a talajoldatokból elvont víz hatására, a visszamaradt sók (itt kalcium-karbonát) kicsapódnak a gyökér körül Fig. 5: Numerous hollow carbonate precipitations along a former root (rhizoconcretion) (southeastern territory, trench 4). Such concretions develop during dry climates as a consequence of the water extracted from soil solutions. The remaining salts (here calcium carbonate) precipitate around the root. size range of sand. Stratificatioir of these deposits measured in the excavation as 170/20 (dipping at 20 degrees towards the south) indicates sediment transport from north to south. The coarse sand and pebble grains indicate the proximity of the river bed. The abundant dark greyish brown clay elasts may be the results of soil redeposition. Since we could not find any trace of antropogenous intervention (debris, objects of use), these phenomenon may bequalified as of natural origin as well. Such a soil redeposition can develop when either the exposed banks of the river or some soil covered islands fall victim to erosion at the time of a high flood. This may also happen when the active river branch suddenly changes its course and doing so erodes the former bank and its environment. A very dark greyish brown ( 1OYR 3/2) sandv, pebbly detritus can be found in the upper 40 cm, in which there occur light brown (2.5Y 6/4) silty stripes. Detritus, metal objects and glass shards can be observed in it. This implies a recent and sub-recent redeposited soil. The dominantly grey, greyish brown traces of burrowing animals