Essay on the Theory of the Earth

Part 31

Chapter 313,982 wordsPublic domain

The strata which cover the bones of elephants are not of very great thickness, and they are scarcely ever of a rocky nature. They are seldom petrified, and there are only one or two cases recorded in which they were found imbedded in a shelly or other rock. Frequently they are simply accompanied with our common fresh water shells. The resemblance, in this latter respect, as well as with regard to the nature of the soil, between the three places, of which we have the most detailed accounts, viz. _Tonna_, _Cantstadt_, and the _Forest of Bondi_, is very remarkable. Every thing, therefore, seems to announce that the cause which has buried them, is one of the most recent of those that have contributed to change the surface of the globe. It is nevertheless a physical and general cause; the bones of _fossil elephants_ are so numerous, and have been found in places so desert and even uninhabitable, that we cannot suppose that they had been conducted there by man. The strata which contain them and those which are above them, shew, that this cause was aqueous, or that it was water that covered them; and in many places these waters were nearly the same as those of our present sea, since they supported animals nearly the same. But, it was not by these waters that they were transported to the places where they now are. Bones of this description have been found in almost every country that has been examined by naturalists. An irruption of the sea that might have brought them from places which the _Indian elephant_ now inhabits, could not have scattered them so far, nor dispersed them so equably. Besides, the inundation which buried them has not risen above the great chains of mountains, since the strata which it has deposited, and which cover the bones, are only found in plains of little elevation. It is not, therefore, seen how the carcases of elephants could have been transported into the north, across the mountains of _Thibet_, and the _Altaic_ and _Uralian_ chains.

Further, these bones are not rolled; they retain their ridges and apophyses; they have not been worn by friction. Very frequently the epiphyses of those which had not yet attained their full growth, are still attached to them, although the slightest effort would suffice to detach them. The only alterations that are remarked, arise from the decomposition which they have undergone during their abode in the earth. Nor can it with more reason be represented that the entire carcases had been violently transported. In this case, the bones would indeed have remained entire; but they would also have remained together, and would not have been scattered. The shells, millepores, and other marine productions which are attached to some of these bones, prove besides that they had remained at least some time stripped and separated at the bottom of the fluid which covered them. The elephants’ bones had therefore already been in the places in which they are found, when the fluid covered them. They were scattered about in the same manner as in our own country the bones of horses and other animals that inhabit it may be, and as the dead bodies are spread in the fields.

Every circumstance, therefore, renders it extremely probable, that the elephants which have furnished the fossil bones, dwelt and lived in the countries where their bones are at present found. They could only, therefore, have disappeared by a revolution, which had destroyed all the individuals then living, or by a change of climate, which prevented them from propagating. But whatever this cause may have been, it must have been sudden. The bones and ivory which are found in so perfect a state of preservation in the plains of Siberia, are only so preserved by the cold which congeals them there, or which, in general, arrests the action of the elements upon them. If this cold had come on by degrees and slowly, these bones, and still more the soft parts with which they are still sometimes invested, would have had time to decompose, like those which occur in warm and temperate countries. It would especially have been impossible that an entire carcase, like that discovered by Mr Adams, could have retained its flesh and skin without corruption, if it had not been immediately enveloped by the ice which preserved it. Thus, all the hypotheses of a gradual cooling of the earth, or of a slow variation, whether in the inclination or in the position of the axis of the globe, fall to be rejected.

If the present _elephants_ of _India_ were the descendants of these ancient elephants, which have been preserved in that climate to the present day, from their being there placed beyond the reach of the catastrophe which destroyed them in the others, it would be impossible to explain why their species has been destroyed in America, where remains are still found, which prove that they had formerly existed there. The vast empire of Mexico presented to them heights enough to escape from an inundation so little elevated as that which we must suppose to have taken place, and the climate there is warmer than is requisite for their temperament.

The various _mastodons_, the _hippopotamus_ and the _fossil rhinoceros_ lived in the same countries, and in the same districts, as the _elephants_, since their bones are found in the same strata and in the same state. Yet these animals very assuredly no longer exist. Every thing therefore, Cuvier maintains, concurs to induce a belief that the _fossil elephant_ is, like them, an extinct species, although it resembles more than they one of the species at present existing, and that its extinction has been produced by a sudden cause, by the same great catastrophe which destroyed the species of the same epoch.

3. _On the Great Mastodon, or Animal of the Ohio._

It appears that the _Great Mastodon_ or _Animal of the Ohio_, was very like the elephant in its tusks and whole skeleton, the grinders excepted; that it very probably had a proboscis; that its height did not exceed that of the elephant, but that it was a little more elongated, and had limbs somewhat thicker, with a more slender belly. Notwithstanding all these points of resemblance, the peculiar structure of its grinders is sufficient to constitute it of a different genus from the elephant. It further appears, that it fed much in the same manner as the hippopotamus and boar, choosing by preference the roots and other fleshy parts of vegetables; that this sort of food must have drawn it towards the soft and marshy places; that, nevertheless, it was not formed for swimming, and living often in the water like the hippopotamus, but that it was a true land animal. Its bones are much more common in North America than any where else. They are even perhaps exclusively confined to that country. They are better preserved, and fresher, than any other fossil bones known; and, nevertheless, there is not the slightest proof, the smallest authentic testimony, calculated to impress a belief that either in America, or any where else, there is still any living individual, for the various accounts which we have from time to time read in the journals respecting living mastodons, which had been observed in the forests or plains of that vast continent, have never been confirmed, and can only pass for fables.

NOTE

ON THE CAVES IN WHICH BONES OF CARNIVOROUS ANIMALS OCCUR IN GREAT QUANTITIES.

The extraordinary accumulations of fossil bones in caves and caverns in different districts, especially in those composed of limestone, have for many years engaged the attention of inquirers; and, of late, have afforded many interesting facts to the geologist and zoologist. In England, as will appear from the following details, many different fossil animals have been discovered in limestone caves; but hitherto the caves in Scotland, which will probably be found to contain interesting documents of an ancient population, have not been examined. As the subject is a curious and interesting one, we shall, in the following pages, principally from Cuvier’s great work, lay before our readers a pretty full account of the different caves, especially those that afford bones of carnivorous animals.

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Numerous caves, brilliantly decorated with stalactites of every form, succeeding each other to a great depth in the interior of mountains, communicating together by openings so narrow as scarcely to allow a man to enter them crawling, and which are yet found strewed with an enormous quantity of bones of large and small animals, are without dispute among the most remarkable phenomena which the history of fossil remains could present to the contemplation of the geologist, especially when we reflect that this phenomenon recurs in a great number of places, and over a very extended space of country. These caves have been the object of research of several naturalists, some of whom have well described and figured the bones which they contain; and even before they were explored by the naturalist, they were celebrated among the common people, who, according to their custom, added many imaginary prodigies to the natural wonders which are really observed in them. The bones which they contain were long, under the name of _fossil unicorn_, an important article of commerce and materia medica, on account of the powerful virtues which were attributed to them; and it is probable that the desire of finding these bones contributed much to the more accurate knowledge of these caves, and even to the discovery of several of them.

The most anciently celebrated is the cave of _Bauman_, situated in the country of _Blankenburg_, which belongs to the Duke of Brunswick, to the south of the city of that name, to the east of _Elbingerode_, and to the north of the village of _Rubeland_, the nearest inhabited place, in a hill which forms one of the last declivities of the _Hartz_ toward the east. It has been described by many authors, among whom we shall particularly mention the great _Leibnitz_, in his _Protogæa_, pl. i. p. 97, where he gives a map of it, borrowed from the _Acta Eruditorum_ 1702, p. 305.

Its general direction is east and west, but the entrance faces the north. It is very narrow, although it is under a pretty large natural vault. The first cave is the largest. From this to the second, one must descend by another narrow passage, at first by creeping, and afterwards by a ladder. The difference of level is 30 feet. The second cave is the richest in stalactite of all forms. The passage to the third cave is at first the most difficult of all, and we have to climb with hands and feet; but it afterwards enlarges, and the stalactites of its walls are those in which the imagination of the curious has pretended to see the best characterized figures. It has two lateral dilatations, of which the map of the _Acta Eruditorum_ makes the third and fourth caves. At its extremity, we have still to ascend, in order to arrive at the real third cave, which forms a sort of portal. _Behrens_ says, in his _Hercynia curiosa_, that it cannot be reached, because it would be necessary to descend more than 60 feet; but the above mentioned map, and the description of _Von der Hardt_, which accompanies it, describe this third cave under the name of the Fifth, and place beyond it a narrow passage, terminated by two small grottoes. Lastly, _Silberschlag_, in his _Geogony_, adds, that one of these grottoes leads to a narrow passage, which, descending much, leads under the other caves, and terminates in a place filled with water. There are still many bones in these remote and little frequented parts. Most of those bones which are in collections from this cave, or which have been described, are of the bear genus.

A second cave, nearly as celebrated as the former, and very near, is that which is named, after the _unicorn, Enihornshæle_, at the foot of the chateau of _Scharzfels_, in a part of the Electorate of Hanover which is named the Dutchy of _Grubenhagen_, and nearly upon the last southern declivity of the _Hartz_. It has also been described by _Leibnitz_, as well as by _M. Deluc_, in his Letters to the Queen of England. The entrance is 10 feet high, and 7 broad. We descend vertically 15 feet into a sort of vestibule, the roof of which lowers to such a degree, that, at the end of 60 feet, we are obliged to creep. After a long passage, we come to two other caves, according to Leibnitz; but Behrens adds three or four, and says, that, according to the country people, we might penetrate nearly two leagues.

_Bruckmann_, who gives a map of this cavern (_Epistol. Itin._ p. 34.), represents only five caves, arranged nearly in a straight line, and connected by extremely narrow passages. The second is the richest in bones; the third, which is the most irregular, has two small lateral caves; the fifth is the smallest, and contains a fountain. Of the bones which have been taken from it, some are in the possession of M. Blumenbach and other naturalists; and others have been figured by _Leibnitz_ and _Mylius_. They belong to the bear, hyena, and tiger or lion genera.

The chain of the Hartz also presents some other caves of less celebrity, although of the same nature mentioned by Behrens in his Hercynia curiosa, namely,

The cave of _Hartzburg_, under the castle of the same name, above _Goslar_ to the south. We do not know why Büsching disputes its existence. It is true that Behrens cites J. D. Horstius erroneously, for having seen bones of various animals taken from it; for Horstius speaks only (_Obs. Anat. dec._ p. 10.) of the cave of _Scharzfels_.

The cave of _Ufftrungen_, in the county of _Stollberg_, to the south of the castle of that name. It is named in the country _Heim-knohle_, or _Hiding-hole_. Behrens thinks that fossil bones might be found in it.

Another cave of the same neighbourhood, is named _Diebsloch, Thieves’ Hole_. Skulls have been found in it, which were supposed to be human.

We shall not speak here of those caves of the Hartz in which bones have not been discovered. And even those in which they have been found, are, at the present day, almost exhausted, it being only by breaking the stalactite that any can be obtained, so much of them had been taken away for selling as medicines.

The caves of _Hungary_ come after those of the Hartz, with reference to the remoteness of the time at which they have been known. The first notice of them is due to _Paterson Hayn_, (Ephem. Nat. Cur. 1672, Obs. cxxxix. and cxciv.) _Bruckmann_, a physician of _Wolfenbüttel_, afterwards described them at length. (_Epistola Itineraria_, 77, and _Breslauer Sammlung_, 1725, First Trim. p. 628.) They are situated in the county of _Liptow_, on the southern declivities of the _Carpathian mountains_. They are known in the country by the name of _Dragons’ Caves_, because the people of the neighbourhood attribute to those animals the bones which occur in them, and with which they have been acquainted from time immemorial; but all those which have been figured by authors belong to the Bear family, and to the species which is named the _Great Cave Bear_ (_Grand Ours des cavernes_).

The caves of Germany the richest in bones are those of _Franconia_, of which _J. F. Esper_, a clergyman of the country of _Bayreuth_, has given a very detailed description in a work, printed in French and German, entitled, _Description des Zoolithes nouvellement decouvertes_, &c. _Nuremberg Knorr._ 1774, folio, with 14 coloured plates, and in a memoir inserted among those of the _Berlin Society of Naturalists_, vol. ix. 1784, p. 56. Another description was afterwards given, under the title of _Objets dignes de remarque des environs de Muggendorf_, by J. C. Rosenmüller, folio, with coloured views, Berlin, 1804. And more lately, M. Goldfuss, at present Professor of Natural History at Bonn, and Secretary of the _Academia Naturæ Curiosorum_, has made them the subject of a particular work printed in 1810 in German, under the title of _Environs of Muggendorf_, in which he describes them with the greatest care, as well as the surrounding country, of which he gives a very correct topographical chart. A great part of these caves is situated in a small bailiwick, named _Streitberg_, which was formerly a dependence upon the country of _Bayreuth_, but was inclosed in that of _Bamberg_, and now forms part of the kingdom of Bavaria. The greatest number occur in a small peninsula, formed by the river of _Wiesent_, which falls into the Pegnetz, and belongs to the basin of the _Main_.

However, the chief of all these astonishing caves, those of _Gaylenreuth_, are beyond the limits of this peninsula, being on the left bank of the Wiesent, to the north-west of the village from which it derives its name. The entrance is perforated in a vertical rock; it is 7½ feet high, and faces the east. The first cave turns to the right, and is upwards of 80 feet long. The unequal heights of the vault divide it into four parts; the first three are from 15 to 20 feet high, the fourth is only 4 or 5. At the bottom of this latter, on the level of the floor, there is a hole 2 feet high, which affords a passage to the second cave: it has first a direction to the south, over a length of 60 feet by 40 in breadth, and 18 in height; it then turns to the west for 70 feet, becoming lower and lower until at length the height is only 5 feet. The passage which leads to the third cave is very inconvenient, and one has to turn through various corridors: it is 30 feet across, and from 5 to 6 in height. The ground in it is kneaded with teeth and jaws. Near the entrance is a pit of from 15 to 20 feet, to which one descends by a ladder. After having descended, we come to a vault of 15 feet diameter by 30 in height; and towards the side at which the descent is made there is a cave strewed with bones. On still descending a little, a new arcade is met with, which leads to a cave 40 feet long, and a new pit of from 18 to 20 feet deep. After descending this, we reach a cavern about 40 feet high, all strewed with bones. A passage, of 5 feet by 7, leads to a grotto of 25 feet in length by 12 in breadth. Canals, 20 feet in length, conduct to another grotto of 20 feet in height. Lastly, there is another cave, 83 feet broad and 24 high, in which more bones are found than in any of the others.

The sixth cave, which is the last, has a northerly direction, so that the whole series of caves and passages nearly describes a semicircle.

A fissure in the third cave led to the discovery, in 1784, of a new cave, 15 feet long and 4 broad, in which the greatest quantities of hyena and lions’ bones were found. The aperture was much too small for these animals to have passed through it. A particular canal which ended in this small cave has afforded an incredible number of bones and large skulls entire.

In the Philosophical Transactions of 1822, pl. xxvi. there may be seen a profile of this cave, taken on the spot in 1816, by Professor Buckland, in which is to be especially remarked an enormous mass, entirely composed of bones enveloped in the stalactite, and thus forming an osseous breccia, but of quite a different nature from those which occur at Gibraltar and other places[432].

The cave of _Gaylenreuth_ is one of those the bones of which are most completely known, by the researches which have been made or caused to be made in it for a long time back by distinguished naturalists, such as MM. Esper, de Humboldt, Ebel of Bremen, Rosenmüller, Sœmmering, Goldfuss, &c., and by the numerous and rich collections which these researches have produced. According to the examination which Cuvier has made of the principal of these collections, three-fourths of the bones found there belong to the Bear genus, and to two or three species of that genus. The others belong to the hyena, tiger, wolf, fox, glutton, and polecat, or some nearly allied species. There are also found, although in much smaller number, bones of herbivorous quadrupeds, and, in particular, deer, of which fragments are in the possession of M. Ebel. It would even appear from a passage of M. Sœmmering’s, that a parcel of bones had been got in it belonging to an elephant’s skull[433]. According to Rosenmüller, there were found in it bones of men, horses, oxen, sheep, deer, roes, mules, badgers, dogs, and foxes, but which from the researches made by him in the cave itself, and from their state of preservation, must have been deposited at periods much later than those of the bear, tigers and hyenas[434].

The small peninsula situate nearly opposite to this cave, presents several other caves, as the _Schœnstein_, or _Beautiful Rock_, which contains seven contiguous caverns. The _Brunnenstein_, or _Fountain Rock_, in which, according to Esper, there are only found bones of known species, such as badgers, dogs, foxes, hogs, and deer; but Esper had too little anatomical knowledge for his testimony to be entirely relied on with respect to this. These bones are sometimes encrusted with stalactite. It contains also the _Holeberg_, or _Hollow Mountain_, in which eight or ten caves form a series of 200 feet in length, with two entrances. Bones of the same bears as at _Gaylenreuth_, are found here in various lateral depressions; and there are also deer and hogs.--The _Wizerloch_, so named from an ancient Sclavonic deity formerly worshipped there, the most dismal cavern of the whole country, situate in its most elevated part, and in which some vertebræ have been found. It is more than 200 feet long. The _Wunderhœhle_, which takes its name from its discoverer, has been known since 1773: its extent is 160 feet.--Lastly, the Cave of _Klaustein_, consisting of four grottoes, and upwards of 200 feet deep. Bones have been found in the third grotto, and most abundantly towards its extremity. It might be supposed that the name _Klaustein_ signified _Claw-rock_, and it would thus accord very well with a place where, without doubt, as at Gaylenreuth, a multitude of ungual phalanges of bears and animals of the tiger kind have been found. But M. Goldfuss asserts, that it was called _Klaustein_, or _St Nicholas’s Rock_, after a chapel of this name, which formerly stood upon it.--There are still the _Geiss-knok_, or _Goat Cave_, and a cave discovered in 1793. M. Rosenmüller found in them two human skeletons already covered with stalactite.

The country which surrounds this small peninsula has itself several caves, independently of that of _Gaylenreuth_, as those of _Mockas_, _Rabenstein_, and _Kirch-ahorn_, three villages, situate, the first to the south, and the other two to the north-east of Gaylenreuth. Bones were formerly found in the first. The last bears in the country the expressive name of _Zahn-loch_, or _Tooth Cave_; it also bears the name of _Hohen-mirschfeld_, a village on whose ground it is situate; and the country people have long been in the habit of seeking in it those bones, which they imagined to be medicinal. MM. Rosenmüller and Goldfuss have in fact found bear and tiger bones. There are two others in the territory of the same village, of which the one named _Schneider-loch_ (_Tailor’s Hole_), is said to have furnished the vertebræ of an elephant. That of _Zewig_, close upon _Waschenfeld_, at the very edge of the _Wiesent_, is nearly 80 feet deep; and it is said that skeletons of men and wolves were found in it.

All these hills, containing caves in their interior, and situate so near each other, seem to form a small chain, interrupted only by brooks, and which joins the more elevated chain of the _Fichtelberg_, in which are the highest mountains of Franconia, and from which flow the _Main_, the _Saale_, the _Eger_, the _Naab_, and many small rivers. M. Rosenmüller, and after him, others assert, that those which are in the hills to the north of the _Wiesent_, contain not a single fragment of bone, while those to the south are filled with them.