Abstract: Rock, mineral, fossil associations, structure, geological section, landforms or a part of land which theyrepresent current or former geological process, event or a specialty is defined geosite. Some geologicunits containing fossil associations and outcropping along Hasanağa Stream located in the northwest ofAkçadağ which is a settlement of Malatya city in Eastern Anatolia Region, is seen as a good example tothis definition.The age of the geological units that outcrop along Hasanağa Stream ranges from Mesozoic toQuaternary. Diversity of Tertiary sedimentary units along Hasanağa Stream is represented by Korgantepe,Yenice and Asartepe members of Eocene Darende Formation, Oligocene Muratlı Formation and LowerMiocene Alibonca Formation. The geological units constitute a regular sequence range from Lutetianto Oligocene in Hasanağa Stream. Their abundant larger benthic foraminifera such as Nummulites,Alveolina and Discocyclina are the subject of this study and they have been evaluated within the scope ofgeological heritage.Along the Hasanağa stream also, there are many caves having traces of life in some of them, onboth sides of the valley, in different sizes. Diversity of larger benthic foraminifera and karstic formationsincreases the scientific importance of the district.