Mare versus Lago-mare: marine fishes and the Mediterranean environment at the end of the Messinian Salinity crisis
Mare versus Lago-mare: marine fishes and the Mediterranean environment at the end of the Messinian Salinity crisis
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DOI：
10.1144/0016-764904-158
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发表时间：
2006-01-01
影响因子：
2.7
通讯作者：
Sarti, G
中科院分区：
文献类型：
--
作者：
Carnevale, G;Landini, W;Sarti, G
在约5.5 Ma前的梅西世晚期，在蒸发沉积之后和上新世洪水之前，地中海记录了一次重大的环境变化，所谓的拉戈马相的非海相沉积证明了这一点。这类沉积物广泛存在于地中海盆地，通常以略带咸水的软体动物和介形动物为特征。在这里，我们展示了来自意大利中部拉戈马雷(Lago-mare)沉积物的海鱼遗骸。这些化石以关节骨骼和耳石为代表，采自托斯卡纳州Serredi洞穴‘Lago-mare’层序上部的九个地层层位。海生泛盐类鱼类占主导地位，但也存在属于Myctophidae和Bythitidae科的全海生狭盐鱼类。这些鱼类化石与经典的拉戈马介形虫和软体动物联系在一起。这些鱼类化石清楚地表明，至少在拉戈马雷事件的上一段时间，存在正常的海洋条件，这意味着地中海的海洋重新充填是在梅西纪内，而不是上新世早期。我们赞成对地中海后蒸散期的梅西尼期进行新的古环境解释的必要性。
During the late Messinian, c. 5.5 Ma ago, after evaporitic sedimentation and before the Pliocene flooding, the Mediterranean recorded a major environmental change testified by deposition of non-marine sediments of the so-called 'Lago-mare' facies. Such deposits are widespread in the Mediterranean basin, usually characterized by molluscs and ostracodes of brackish affinity. Here we present marine fish remains from 'Lago-mare' deposits of central Italy. The fossils, represented by both articulated skeletons and otoliths, were collected from nine stratigraphic horizons of the upper portion of the 'Lago-mare' sequence of Cava Serredi, Tuscany. Marine euryhaline fishes strongly dominate the assemblages but fully marine stenohaline fishes belonging to the families Myctophidae and Bythitidae are also present. The fossil fish remains are associated with classic 'Lago-mare' ostracodes and molluscs. These fossil fishes clearly demonstrate that normal marine conditions were present at least during the upper interval of the 'Lago-mare' event, implying that the marine refilling of the Mediterranean was intra-Messinian rather early Pliocene. We argue in favour of the necessity of a new palaeoenvironmental interpretation for the post-evaporitic Messinian of the Mediterranean.