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Updated: May 16, 2025
For nearly six months he was detained at Bambarre from ulcers in the feet, which discharged bloody ichor as soon as he set them on the ground. When recovered, he set off in a northerly direction, and after several days came to a broad lacustrine river, called the Lualaba, flowing northward and westward, and in some places southward, in a most confusing way.
But if the appearance of this lacustrine and amphibious dwelling was striking, and not without a certain rude and massive grandeur, its grounds and possessions, through which the brother and sister were still picking their way, were even more grotesque and remarkable.
If this be so, then we possess a key by which to determine the period of the first formation of volcanoes in Central France; for, as the animal remains enclosed in the lacustrine deposits of the Vale of Clermont belong to the early Miocene stage, and the earliest traces of contemporaneous volcanic ejecta are found only in the uppermost deposits, we may conclude that the first outburst of volcanic action occurred towards the close of the Miocene period a period remarkable for similar exhibitions of internal igneous action in other parts of the world.
A new outburst of volcanic forces marks this stage, during which the chain of the Puy de Dôme was thrown up on the west, and that of the newer cones of the Vivarais on the south-east of the lacustrine tract.
Lakes filled all depressions of the valleys before their waters dug out those permanent channels which, during a subsequent epoch, became our rivers. And wherever we explore, in Europe, Asia, or America, the shores of the literally numberless lakes of that period, whose proper name would be the Lacustrine period, we find traces of neolithic man.
The absence of many fossil forms usually met with in marine strata, affords a useful negative indication of the fresh-water origin of a formation. For example, there are no sea-urchins, no corals, no chambered shells, such as the nautilus, nor microscopic Foraminifera in lacustrine or fluviatile deposits.
In consequence of this condition, lacustrine beds are rarely found of great antiquity; they generally disappear soon after they are formed. Where preserved, their endurance is generally to be attributed to the fact that the region they occupy has been lowered beneath the sea and covered by marine strata.
The eastern coast region of Asia Minor, the western of Greece, and many of the intermediate islands, exhibit thick masses of stratified deposits of later tertiary age and of purely lacustrine characters; and it is remarkable that, on the south side of the island of Crete, such masses present steep cliffs facing the sea, so that the southern boundary of the lake in which they were formed must have been situated where the sea now flows.
It was before stated that the Miocene formation of Switzerland consisted of, first, the upper fresh-water molasse, comprising the lacustrine marls of Oeningen; secondly, the marine molasse, corresponding in age to the faluns of Touraine; and thirdly, the lower fresh-water molasse. Some of the beds of the marine or middle series reach a height of 2470 feet above the sea.
Ever since one was a small boy, reading Stoddart's "Scottish Angler," and old Blackwood's, one had pined for a sight of "The Necromaunt," and here, clean in its "pure purple mantle" of smooth cloth, lay the desired one! "Like Dian's kiss, unasked, unsought, It gave itself, and was not bought," being, indeed, the discovery and gift of a friend who fishes and studies the Lacustrine Muses.
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