SHADOWS on the TRAIL Pentalogy - Let the Adventures Begin!: From Clovis to Hell Gap

Figure One - Paleoindian Projectile Point evolution from oldest on the left to old on the right.
From left to right, Clovis (northern Colorado), Goshen (Nebraska Panhandle), Folsom
(northern Colorado), Agate Basin (north-central Colorado), and Hell Gap (eastern
Colorado). For scale, Hell Gap is 2.55 inches long. John Bradford Branney Collection.

Using radiocarbon dating and geology, scientists are able to establish age ranges for different prehistoric cultures and the associated stone projectile point types. For example, scientists estimate that the Folsom prehistoric culture existed from around 10,900 to 10,200 RCYBP. This is based on a 10,900 RCYBP age from the Hanson site in northern Wyoming and a 10,200 RCYBP age from the Hell Gap site in southeastern Wyoming. This means that when I find a Folsom projectile point out on the surface of the prairie, I pretty much know how old it is and who made it. As more and more archaeological evidence is unearthed, scientists will fine-tune the Folsom prehistoric culture and age.

Without getting too far into the weeds, I want to explain the above dates, the 10,900 to 10,200 RCYBP. Those dates are uncalibrated or uncorrected radiocarbon dates, often referred to as Radiocarbon Years Before Present, with Before Present representing the year 1950. Archaeologists and scientists oftentimes publish uncalibrated or uncorrected radiocarbon ages like the above, even though uncalibrated radiocarbon dates can be misleading and do not tie up well to calendar years. For example, 10,000 RCYBP (uncalibrated radiocarbon years) corrects to approximately 11,695 to 11,336 calendar years from 1950, depending on the correction model used. And 11,000 RCYBP corrects to approximately 13,000 calendar years; two thousand years of correction going from uncalibrated to calibrated radiocarbon dates! When you read an author quoting Clovis at 11,000 years bp that is an uncalibrated radiocarbon date. The Clovis prehistoric culture was really around 13,000 calendar years old. So be careful when you are looking at ages and dates. For more information, see my article on Reporting Radiocarbon Dates.

Below is a scene from my prehistoric thriller book series the SHADOWS on the TRAIL Pentalogy. In this particular scene from the first edition of my first book SHADOWS on the TRAIL, the leaders of a Paleoindian

Figure Two - CLICK for ADVENTURE

tribe found a spear point near the remains of their burning village. From the style and technology of the spear point, Avonaco identified the people and culture who made the spear point and destroyed his village. In my book series, I emphasize my belief that certain Paleoindian projectile point types overlapped chronologically and geographically, and that Paleoindian projectile point evolution was not a serial process but more like a parallel process.

Avonaco held the spear in his hands. The spear shaft was the same wood that the River People used, but the stone spear point was different. The stone spear point was thinner and longer than any Avonaco had ever seen and made from a shiny, black rock material. Avonaco ran his thumb down the sharp edge of the spear point and quickly pulled his thumb away.

“Éŝkos!–Sharp!” Avonaco exclaimed, looking down at his bleeding thumb.

He continued to examine the spear point, “I have only seen a spear point like this once made from this black rock. When I was a boy, I found a spear point much like this deep in the mountains. My father told me the black rock comes from the mountains.”

Avonaco then inspected the sinew wrap that connected the stone spear point to the wooden spear shaft. The River People used sinew from deer or bison to attach their spear points. Avonaco pointed to the sinew and said, “This is too thin, it is not from bison or deer.”

Avonaco ran his fingers down the smooth wood of the spear and noticed it had carvings in it. To see better, Avonaco moved the spear shaft closer to the light of the campfire. Carved into the

wood were five green-painted peaks next to two orange-painted suns : ҉ Ʌ Ʌ Ʌ Ʌ Ʌ ҉ Waquini and Vipponah leaned over Avonaco’s shoulders to take a better look.

Vipponah asked, “Tipis?”

Avonaco thought about this and replied, “Mountains, maybe.”

The spear point that Avonaco inspected was a calling card for the people who made it. Just like Avonaco, scientists and collectors interpret and analyze prehistoric clues from projectile points. While Avonaco noted the differences in material and projectile point style, scientists and collectors recognize the differences in projectile point technologies and tie them back to specific prehistoric cultures.

Figure Three - Paleoindians making their way.

Archaeological evidence and radiometric dating lean toward specific Paleoindian projectile point types overlapping with other Paleoindian projectile point types in both time and space. The High Plains Paleoindian projectile point types in figure one represent a chronological and technological continuum from the oldest stone projectile point on the left, a Clovis point made sometime around 13,000 years ago to the youngest projectile point on the right, a Hell Gap point made sometime around 11,500 years ago (calibrated radiocarbon ages). The Clovis prehistoric culture was gone by the time Paleoindians started making Hell Gap styled projectile points, but Hell Gap most likely overlapped in time with other prehistoric cultures such as Agate Basin and the Cody Complex.

One way to illustrate this is with Table One below. It shows the statistical age ranges for each of the prehistoric cultures represented in Figure One above. As a reminder, B.P. in this table represents uncalibrated or uncorrected radiocarbon dates from the baseline year of 1950. I don't want to get hung up on the actual ages because as more archaeological data surfaces and technology improves, these age ranges will become better defined. My point is that these projectile point types statistically overlap in time, just as archeological sites indicate that these projectile point types overlapped in geographical space.

The age ranges in Table One are from a single source, the book Projectile Points of the High Plains by Jeb Taylor. You will find that ages for prehistoric cultures vary from book to book and that ages are periodically updated as radiometric technology improves, but what stays the same is the overlapping projectile point technology concept. As a reminder, the ages in Table One are uncalibrated or uncorrected radiocarbon dates. For example, Clovis and Folsom 'calibrated years ago' are around 13,000 and 12,600 years ago, respectively.

Prehistoric Culture	Earliest Date	Latest date
Clovis	11,300 B.P.	10,600 B.P.
Goshen	11,000 B.P.	10,700 B.P.
Folsom	10,900 B.P.	10,200 B.P.
Agate Basin	10,400 B.P	9,000 B.P.
Hell Gap	10,400 B.P.	9,500 B.P.

Table One. B.P. is uncalibrated radiocarbon age in years benchmarked from 1950.

It should be noted that in some cases the width of the age ranges in Table One might not be due to overlap but to the sampling and technology limitations of the radiometric measurements.

If the overlap is legitimate between Paleoindian projectile point types, it opens up a number of mind-blowing questions, such as were the different projectile point types made by the same or different prehistoric cultures? Were the changes due to manufacturing process differences or changes in style? Did different prehistoric cultures make different projectile point types and just utilize the same sites or did the same culture make the different projectile point types? Were these projectile point types made by prehistoric cultures with different religions, beliefs, and languages?

Figure Four - Paleoindian artifacts from the Author's collection.
From left to right: Clovis, Goshen, Hell Gap, Agate Basin,
and Folsom. Agate Basin is 4.6 inches long.

There is a high probability that we will never know the answers to these questions, we can only speculate, but it is fun to ponder these questions anyway. There is currently no archaeological evidence that defines the relationships between the people and cultures who made these different projectile point types. Scientists fill in these blanks with conjecture and theory. As an author of historical fiction novels about Prehistoric America, these blank spaces provide me some latitude in my stories, as well as food for thought.

When I wrote the SHADOWS on the TRAIL Pentalogy, I extensively researched the archaeological evidence from Folsom Paleoindian sites. I wrote my stories based on archaeological data combined with my own fictional spin and plot. I invite you to read the SHADOWS on the TRAIL Pentalogy and join the adventure.