Middle Miocene lacustrine marls from the Gračanica coal mine ~ 10 km SSE of the city of Bugojno, Bosnia and Herzegovina, have yielded a species-poor florule comprised of angiosperm leaves (Lauraceae, Myricaceae, “Rhamnus” warthae), Glyptostrobus europaeus twigs, a frond fragment of Pronephrium stiriacum, and a seed assignable to the Vitaceae. The composition of the florule is suggestive of a swampy lowland environment; climatic conditions were humid subtropical (Cfa climate). Lignite seams containing abundant fossil wood (including large logs) characterise the deposits underlying the marls; the interburden between the lignite has yielded abundant plant chaff, including shoot fragments of Equisetum, and the charophyte gyrogonites Lychnothamnus duplicicarinatus and Chara molassica notata.

中文翻译：

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波斯尼亚和黑塞哥维那中部中新世中新世格拉桑尼卡中层沉积物的大型植物和风生藻类陀螺

从格拉查尼察煤矿城市布戈泽诺，波斯尼亚和黑塞哥维那的〜10公里SSE中中新世湖相泥灰岩，已经取得了包括被子植物叶（樟科，杨梅科“的物种稀少florule鼠李” warthae），水松europaeus树枝，一ne草的叶状片段，和可分配给Vi科的种子。小花的组成暗示着沼泽低地的环境。气候条件是亚热带湿润（Cfa气候）。含有丰富化石木材（包括大块木材）的褐煤接缝是泥灰岩下沉积的特征。褐煤之间的覆盖层产生了大量的谷壳，包括木贼科的枝条以及风化的藻藻体Lychnothamnus duplicicarinatus和Chara molassica notata。