This was a fast reading and not too technical (more historic than scientific) book with in-depth coverage of one fossil-bearing site, one now preserved at Big Bone Lick State Park in northern Kentucky, and of the fossil finds from that site. Additionally, the book is about the conclusions drawn from those finds and how they influenced American and world paleontology and geology. Rather than trying to weave a grand narrative of how Big Bone Lick gave birth to American paleontology, the author appears to have decided to instead detail the history of the finds and the study of the site and then along the way note how these finds had much broader implications. Emphasis was placed more on the history of the people who explored the site and the development of a paleontology as a result rather than providing detailed information on the animals unearthed (though they are discussed and often illustrated with photographs or drawings). As part of the process of detailing the history of the site the author extensively quoted from primary source material, such as articles, books, and letters (as well as provided contemporary illustrations of the bones and teeth that were uncovered at the site).
Big Bone Lick the reader learns is really two things. It is a salt spring in what is now Boone County, Kentucky, near the Ohio River, the sulfurous brine that feeds the salt springs owing its origin to either pre-Ordovician Mount Simon Sandstone or the Ordovician St. Peter Sandstone. The salt spring has been described as a “muddy pond,” roughly about 200 yards wide and very sulfurous in smell or more recently a series of large boggy areas in an area of about 60 acres, each bog about 50 feet across. The site is also a “lick,” “an area where wet, salty soil was licked and trod upon by bison, elk, and deer…a large area of bare dirt depressed three to four feet below the floor of the wooded Big Cone Creek valley…[with the] licking, stamping, and burrowing of salt-seeking mammals, especially the abundant bison…responsible for creating the depression.” At least four bison roads (or buffalo traces) each up to fifteen feet wide, were known to lead through the woods to Big Bone Lick, roads also utilized by Native Americans to travel, hunt, and procure salt.
Importantly for the book, it is also a place where Native Americans and European settlers found “huge femur and rib bones, great ivory tusks, jawbones wider than the span of a man’s arms, molars the size of pumpkins,” bones that for a time were easily obtained on the surface of the ground and for many decade after with just a little digging.
First becoming known to Europeans in 1739 thanks to a French military expedition, it had been in use by Native Americans for hundreds of years as a source of salt, later becoming a major resource for Kentucky, Ohio, and Indiana farmers who needed salt to make soap, manufacture leather, dye fabric, produce cheese, and most of all to salt meat (mostly pork) for transport. Though vital for a time, commercial production of salt from the site ceased in 1812 as other Ohio Valley salt springs had stronger brine (the Lick’s brine, to produce a bushel of salt, required between 500 and 1,000 gallons of salt water while other, later discovered salt springs only required as little as 50 gallons). Afterwards the Lick continued to be of use to local farmer and their livestock and later got a second life as a health resort as people sought the Lick’s brine for medicinal purposes (which did big business in the 19th century but by the early 1900s was largely a thing of the past).
While the history of the Lick’s use in commerce and industry was interesting, the real reason the reader would care about this place is the bones, teeth, and tusks there, barrels and barrels of bones that were excavated (for many years just laying exposed on the ground thanks to the actions of erosion and the wallowing around first of bison, later of cattle, who loved the Lick). Bones from the site were later studied by such notable naturalists as Georges-Louis Leclerc de Buffon and George Cuvier and by amateurs such as Benjamin Franklin, George Washington, Thomas Jefferson, Meriwether Lewis, and William Henry Harrison (the latter two of which personally collected fossils from the site). Almost as long as the Europeans knew of the site’s salt springs they knew of the bones there (the earliest known European awareness was a letter from western Pennsylvanian naturalist James Wright sent to Philadelphia botanist John Bartram in the 1760s).
One of the more interesting aspects of the book was how interpretations of the bones found there varied so much over time. Native Americans often identified the bones as belonging to vanished spirits, “of the homicidal great buffalo,” that they were the “remains of monstrous animals that were struck dead by spirit-propelled lightning bolts” or, according to the Iroquois, were the remains of large bison “killed by arrows shot from the bows of pygmies.” Little People who did a great service by extinguishing the dangerous Witch Buffalo.
European and American thought on the subject was far ranging indeed on the nature of the bones there and was a major component of the book, as study of the bones found there forced people to reconsider the age of the Earth, whether or not animals could go extinct (for a time it was thought that it was practically heretical to conclude that animals created by God could ever go extinct, with some individuals such as Thomas Jefferson a bit hopefully saying that the animals represented at the Lick must exist somewhere out west, though to his credit Jefferson as described by the author made a personal journey where he accepted that in fact animals could go extinct). A major component of the book was the development of professional and private thought on what the bones of the Lick meant, as their placement, numbers, and the lack of modern living representatives precluded previously held notions that they were either deposited there by Noah’s Flood or were animals somehow still alive out west, something exploration was rapidly revealing to not be the case.
Even issues of age of the earth and religion aside, researchers long struggled with what creatures were being unearthed at the Lick; were they elephants or hippos or rhinos? Maybe a long-lost relation, perhaps adapted to colder climes? Something entirely new? Were they carnivorous? This to me was a bit more interesting than the impact on religious thought and views of the age of the Earth (and also one that seemed to be a bit less driven by agenda but rather largely was confined the facts of the bones, teeth, and tusks themselves). The simple acceptance of such facts as “the curious shape of the teeth, the nontropical climate of Kentucky, and the absence of elephant sightings in the Americas” lead people to accept what they had found; newly discovered species that were no longer alive (though it took even longer to come to understand what they had in fact discovered).
Big Bone Lick produced a lot of firsts (hence the title of the book, Cradle of American Paleontology). The first ever picture of an American vertebrate fossil was of a massive molar (collected in 1739 and described by Georges Cuvier in 1756). The Lick gave the world the first known mastodon (described by Georges Cuvier in 1806, using the Greek terms for “breast” and “tooth” to note the conical protuberances on the molars – at the time called grinders). The elk-moose (genus Cervalces, its scientific name “reflects its features were intermediate between those of an elk (genus Cervus) and those of a moose (genus Alces)) was first discovered there, described in 1818. Also discovered for the first time thanks to find at the Lick was Bootherium bombifrons, variously known as Harlan’s musk ox, woodland musk ox, or helmeted musk ox, a taller and more slender and now extinct relative of the tundra musk ox that once lived in boreal forests and grasslands. Ancient Bison (once a separate species, Bison antiquus, not a subspecies, Bison bison antiquus) was also first found at the site (this species not described until 1852 as it lay unstudied from an 1807 collection in a Philadelphia museum cabinet). Yet another first was Equus complicatus – the complex-toothed horse, (“distinguished from other extinct horses by the pattern of complex folding on the molar’s grinding surface” and once a species widespread in the east-central and southeastern U.S.). Harlan’s Ground Sloth – Mylodon harlani – was another species discovered at the Lick, described by Richard Owen in 1840.
The book was a quick and easy read and very well researched. At times, it was maybe a bit too focused on the actual history and science of the Lick rather than delving into the “cradle” aspect of the title. I would have liked a bit more on that aspect or at least that aspect brought out a bit more, though the information is there. It could be a little dry at times and a few times the extended use of contemporary, primary source material in big block quotes was maybe a bit much. It could have a tiny bit lighter tone, maybe by a humorous spin on the fact that so many shipments of bones from the Lick sent to other places were lost in transit, often through sinking ships. Still, a good book and one I am glad I read.