GeoNotes Cypress Hills and area
THE BIG THAW OF 17,000 YEARS AGO
the nature of glacial dynamics, and our changing climate
By Visit Greenland from Nuuk, Greenland - Blue ice in South Greenland, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=30613876
Virtually all the landscapes in SW Saskatchewan and SE Alberta are post-glacial originating from the last glacial cycle which peaked around 20,000 years ago. This peak is known as the Last Glacial Maximum (LGM). The continental glacier stopped 150-200 km across the international border in northern Montana leaving Canada almost completely covered in ice. Around 18,000 years before the present (BP), the planet began its warming trend and the continental glacier slowly began to melt as the deglaciation process moved northeastward. The ice front's initial rate of retreat was 60 m/year and 275 m/year in the final stages with an average retreat of 150 m/year.
South of the Cypress Hills, deglaciation began early around 20,000-18,000 BP with the formation of a 341 km long Frenchman River channel with its headwaters at Cypress Lake. By 17,000 BP glacial melting deposited unsorted angular glacial debris (till) into various types of morainal deposits (glacial landforms) up to 30 m thick in some areas along with other minor glacial landforms such as the drumlins near Dollard, SK. The meltwater streams on the ice sheet and ground reworked some of this angular debris into more rounded pebbles, cobbles, and boulders. Some of the well-rounded clasts in the glacial debris are reworked gravel from preglacial river channels, and where the glacial debris flanks the Cypress Hills the well-rounded gravel came from the Cypress Hills Formation.
The meltwaters also washed out the sand, silt, and clay materials, and deposited them in outwash plains and glacial lacustrine (glacial sediment) lakes. Glacial meltwaters carved the landscape into deep valleys and broad channels some of which, today, are occupied by small "underfit" streams and rivers. An underfit stream or river is too small to have created the valley in which it is situated. Some examples are the Battle Creek and Frenchman River valleys, and the Gap separating the Center Block from the West Block of the Cypress Hills.
The meltwater channels south of the Cypress Hills are much larger than those north of the hills. This has led some researchers to conclude that there was more glacial meltwater activity to the south and that much of the ice in the area had melted before the ice front began to retreat.
Occasionally very large boulders (glacial erratics) can be seen in the debris mix. Less rounded and more angular boulders saw less glaciofluvial (glacial water) rounding to their surfaces. Aeolian or eolian (pronounced eh-oh-ly-an) or wind deposits are also present and are deposited as fine silt (loess) on the Cypress Hills West Block plateau, and as sand dunes in proglacial outwash plains. Proglacial simply means in front of, at, or immediately beyond the margin of a glacier.
Much of the sand and finer materials in the debris mix came from the abrasion or grinding of rocks at the base and within the dynamics of glacial movement. This process also creates rounded edges on the glacial debris clasts which are further rounded by fluvial activity.
The more erosion-resistant erratics and boulders from the Canadian Shield give a false impression that most of the material came from the shield; however, only some of the debris came from there. The rest came from preglacial terrains as the ice sheet slowly moved southward beyond the Shield. The basal till is generally regarded as consisting of local debris reflecting its local bedrock source. During deglaciation distantly transported debris can also get mixed in with locally derived till.
When the continental glacier (Laurentide) of the last glacial cycle (Wisconsin) began to advance approximately 115,000-100,000 years ago it flowed over remnants of ancient worn down mountain belts older than 543 million years (Precambrian) from northern Saskatchewan's and northern Canada's shield region. As the glacier moved southward, the freeze-thaw weathering process plucked and quarried out rocks from the exposed rocky surface (outcrop) making up the various igneous, and metamorphic rock formations of the Canadian Shield. These ancient mountain ranges were created much in the same way the Rockies and other mountain ranges were and are created when two tectonic crustal plates collide resulting in a crinkling effect creating the mountains. This crinkling generates extreme pressures and temperatures that transformed the igneous and sedimentary rocks into metamorphic rocks. Along with the eroding mountain belts, erosion of the Canadian Shield also exposed subsurface intrusive igneous plutons comprising mostly of granitic and granitoid mineral compositions. Most of the boulders and erratics seen in the area of the Cypress Hills came from metamorphosed sedimentary rocks, and to a lesser extent metamorphosed igneous, and igneous plutonic rocks that were once part of the Canadian Shield. Some rocks, for example, the creamy-white claystone are regionally or locally derived from subcrop (unexposed) rock formations.
Glaciers and ice sheets look very rigid and are brittle creating crevasses on the surface as the ice moves, but deeper down due to the immense weight the glacial ice becomes semi-plastic. The basal plasticity of the ice makes it flow very slowly with an occasional surge over the land surface as it incorporates the loose surface material into the glacier. The bulk of this material is carried within and at the base of the glacier similar to that of a dump truck only to be dropped later during a time of ablation (melting).
The Laurentide Glacier began with at least three cold cells (1,2, and 3 in Fig. 1) in northern Canada forming three distinct regional ice sheets that eventually joined into one large glacier. Glaciers tend to create their own environment and over many tens of thousands of years when snow accumulation exceeds ablation continental glaciers like the Laurentide can get very thick growing upwards to more than 3 km in the northern regions. Prior to glaciation, there was an overall average temperature drop of 4 degrees Celsius which continued until the warming trend began around 20,000 years ago.
The regional ice sheets grow and move by extending lobes that move independently of each other. The lobes surge forward moving faster than the main ice sheet, and are aided by water at the base acting as a lubricant. These lobes eventually meet adding to a growing glacial mass that can eventually cover an entire continent.
Glacial retreats or advances are not linear and more like a two or three-step forward and backward dance readvancing and retreating several times in an area with an overall trend either to advance or to retreat. The tree line which includes tundra, sub-tundra vegetation, and the Boreal forest is also very sensitive and fluctuates with glacial movements. Between 20,000-12,500 BP, the Cypress Hills and area experienced five glacial retreats and readvances each distinguished by their morainal deposits. This process can create complex glacial terrains making it a challenge to unravel glacial and paleoclimate events.
During the last glacial maximum, the Laurentide glacier in SE Alberta and SW Saskatchewan reached a maximum thickness of 1 km with the ice thickness decreasing southward. Ice lobes flowed around the Cypress Hills and through the Gap leaving the top 95-100 m unglaciated exposing the landmass as three distinct nunataks, today known as blocks. The West Block nunatak is the largest and comprises an area of 300 sq km. It is separated from the Central Block by morainal deposits and glacial meltwater channels known as the Gap. Today, the West Block reaches a peak of 1467 m at Head of the Mountain in Alberta, the highest peak between Labrador and the Rocky Mountains.
The three unglaciated blocks, locally called benches, of the Cypress Hills are the West, Center, and East Block. They are remnant erosional plateaus with preglacial V-shaped fluvial (water) valleys going back to Late Tertiary (11.6-2.6 million years) and were formed under arid to semi-arid climate conditions. Interestingly, the oldest glacial deposits on the plateau not touched by the Wisconsin glacial cycle consist of scattered glacial material and erratics derived from northern Canada that are possibly older than 200,000 years, much older than Wisconsin, or even the Illinoian glaciations (see Figure 2 time scale).
Cryogenic (deep freezing) effects of the glacial climate on soils are noticeable on the West Block nunatak including solifluction (movement of wet soil down an already frozen slope), frost wedges, and freeze-thaw movement of pebbles. It should be noted when researching this article the more recent information showed three distinct unglaciated sections in the Cypress Hills; however, the extent of glaciation on the East and Center blocks is somewhat ambiguous.
Glacial scientists using Greenland and Antarctic ice core samples can go back approximately 1.5 million years to obtain paleoclimate data. This gives them a continuous record that accurately defines changing climates by measuring variable concentrations of atmospheric gases trapped in air bubbles found in the ice core sequences. Dust, ash, and pollen in the core sequences are also important paleoenvironmental indicators. The data plotted in Figure 2 strongly suggests that natural CO2 is an excellent indicator for identifying the beginning and the end of glacial and interglacial cycles of the past 2.5 million years. The sudden rise of CO2 today (time 0) in Figure 2 may not be natural and could be a result of statistical exaggeration of climate modelling based on anthropogenic effects which may not reflect our current natural CO2 level. It should be noted that the observations at the CO2 monitoring stations at Mauna Loa, Hawaii, Canada, and around the world do show a slow rise in CO2 concentration over time; however, according to some climatologists, there is very little or no indication that there is an increase in temperature from the additional CO2 released into the atmosphere. Studies also show a CO2 increase beginning with the Industrial Revolution in the mid-18th century. Antarctic ice core samples strongly indicate when the planet warms, a rise in natural CO2 concentration follows as the oceans, the world's largest carbon sinks, warm up. The opposite is true when the planet cools. The additional CO2 then creates a warming or cooling feedback loop affecting the climate on a smaller scale. The release of natural CO2 from the oceans due to their warming may be the main source of CO2 and the manmade CO2 contribution may be minimal.
There is disagreement and confusion in the scientific literature and among the public as to the CO2-temperature relationship and how much CO2 is actually anthropogenic. There are also conflicts over the heat source that drives the current CO2 levels and global warming temperatures, and the same would obviously be true for global cooling and lower CO2 levels. The large and small climate cycles and events (El Nino and La Nina) are complex and their relationship is not straightforward.
The glacial maximum cycles over the past 650,000 years are rhythmically occurring approximately every 100,000 years with an interglacial period lasting between 10,000 to 30,000 years. According to glacial experts, the data in Figure 2 suggests the ice age cycle may not be over yet, and that we are currently living at the peak of a natural CO2 cycle in an interglacial period (Holocene Interglacial) within an overall larger glacial cycle (the Laurentide glacial period) which began approximately 2.6 million years ago, the beginning of the Quaternary period. Within the Quaternary is the latest epoch, the Holocene epoch, which began at the end of the last ice age. The generalized accepted beginning of the Holocene varies with locality and is between 12,000-8,000 BP.
Figure 2 reveals more striking information. Over the past 650,000 years, we had at least 7 major ice ages (blue) and interglacial (red) periods along with smaller glacial advances and retreats, and many minor warming and cooling periods. The warming trend and deglaciation that began 18,000 years ago may well be continuing today as seen by the overall melting of ice fields in Greenland, Northern Canada, and the localized melting of the extensive Saint Elias alpine glaciers which cover the Saint Elias Mountains in northern B.C., Yukon, and Alaska. These ice fields may be remnants of ice from the Cordilleran Ice Sheet and the Wisconsin glacial cycle (Fig. 1) melting and contributing to the rising ocean levels. The earth's climates vary greatly, and in the higher alpine elevations and to some extent in colder continental environments (e.g., Antarctic) some areas of the world may experience glaciers retreating or disappearing while other areas may see glaciers forming or advancing. Slight average temperature fluctuations trending hot or cold are most noticeable in higher elevations, including the Cypress Hills, colder climates, and the coldest part of the day just before sunrise. For instance, my parents owned a ranch in the Cypress Hills on the south side near the summit of the East Block. From 1976-1996, a small fractional rise in temperature was enough to send farmers seeding three to four weeks earlier and extend their fall harvesting by an additional month. The overall summer temperatures and moisture in the hills remained the same as before the warming trend, however; the winter temperatures were generally warmer with less winter snowfall. According to some climatologists, the temperature rise tapered off until the mid-2000s when the average warming trend continued upward.
What initiates and terminates ice ages and large and small-scale climate cycles is not well understood. There are many competing theories, ideas, and questionable predictive models some of which are wrapped in political agendas (e.g. Climategate) that are used as the basis for drafting extremely profitable climate policies (e.g. carbon taxes). Still, others believe the 'climate change' and 'climate crisis' cliches are a cover for more sinister large-scale military-style weather manipulations used in weather wars by state and possibly non-state actors within the military-industrial complex. When experiencing an extreme record-breaking weather event, a question comes to mind, can the earth's current natural weather dynamics actually produce such an event, or has it been assisted artificially?
Climate disruptions may be caused by a single event or several events working together. Cosmological, planetary, and anthropogenic (man-made) factors have been attributed to climate change. Increasingly, more scientists are beginning to suspect that small and large climate variations are driven by activities from within the sun that can affect the solar radiation output. This somewhat minimizes the effects of the traditionally accepted Milankovitch cycles.
The Milankovitch cycles have long been associated with the possible causes of major planetary climate disruptions, such as ice ages. However, in recent years some climate scientists have argued that the cyclical variations are not great enough to produce the extreme climate effects that the earth has experienced in the past. These cycles include Earth’s orbital eccentricity around the sun (deviation of Earth orbit from circularity, 100,000-year cycles), obliquity or Earth’s axial tilt going from today’s 24.5 degrees to 22.1 degrees of the past (obliquity, 41,000-year cycles), and precession or direction of tilt (earth's wobble, 26,000-year cycles) going from today’s faint North Star to a brighter star Vega 13,000 years ago.
Our Changing Climate
As mentioned previously we are currently in an interglacial interval coming out of the recent Wisconsin glacial period that dominated most of Canada, Northern Europe, and Northern Russia approximately 20,000 years ago. Whether we are still in the deglaciation cycle or about to begin a new glacial cycle is not known. How much CO2 played in global warming in the geological past to the present can be seen by following the temperature and CO2 curves in the charts below. Contrary to popular belief there is little correlation between CO2 and temperature except when the temperature rises a CO2 increase follows. However controversial, it appears, that the increased heat source is likely a change in solar irradiation and is the main driver of the heating and cooling on Earth, and that today's man-made CO2 contribution to global climate warming is minimal. NASA, on the other hand, disagrees, saying there has been a decoupling of solar irradiance and temperature since 1958 and that anthropogenic CO2 is currently driving climate warming. NASA agrees that higher CO2 levels are beneficial to plant growth and Earth's greening.
Interestingly, NOAA's Mauna Loa, Hawaii CO2 monitoring station officially began monitoring the rising CO2 levels in 1958. The year was significant and widely publicized as the International Geophysical Year (IGY) marking the beginning of international cooperation between two rival superpowers (US and USSR) studying and researching a wide range of geophysical topics including solar output, Earth's climate, greenhouse gases, and the Antarctic. IGY occurred at the peak of a solar maximum cycle, Solar cycle 19. This is also the year NASA, coincidentally, shows the start of their solar irradiance and temperature diversions. This is curious for two reasons. First, are the scientific and public disagreements and confusion over climate science based on a two-tiered science, one that is publically hidden and debunked when it surfaces, and the other with alterations presented to the public? Second, did the IGY lay the foundation for the future commercial exploitation of some of their findings, such as increasing CO2 levels?
A couple of interesting studies, cited by Mason (2024), question whether current levels of CO2 in the atmosphere can further drive temperatures upwards. Mason summarizes the studies in the following statement, "the detailed dynamics of how, when and to what degree CO2 transforms radiation into atmospheric heat are anything but settled [IPCC, WEF, and UN say it is settled and we must trust the science]. So much remains unknown that recent academic research inquiring whether CO2 at its current atmospheric concentrations can even absorb more heat amounts to breaking new ground in climate science. If it can’t, notes Mason, then further changes in CO2 levels not only won’t drive “global boiling” [UN rhetoric], they won’t have any impact on climate at all."
Earth's climate, and its relationship to the sun, the solar system, and the cosmos are complicated and dynamic and not well understood by mainstream science. It seems more likely that today's seasonal climate variations have been greatly exaggerated and confused by greedy exploitive capitalists and their political associates working and manipulating the science, technology, governmental policies, and social systems to their advantage, and fueled by media sensationalism and propaganda when in actuality these small and large seasonal climate cycles and fluctuations are completely natural. The United Nations (UN), Intergovernmental Panel on Climate Change (IPCC), and World Economic Forum (WEF) are the main proponents of man-made climate change and 'encourage' governments, organizations, media, and influential individuals to follow their distorted narrative and fascist ideological beliefs that do not favour or hinder the development of a viable sustainable, organic, holistic, self-sufficient, and enlighted future for all of humanity.
CO2 in PPMV vs. temperature for the past 570 million years. Source: Holoceneclimate.com
General graph of CO2 (PPM) concentrations over the past 60 million years. Possible future CO2 levels based on models. Source: Texas A&M Today
CO2 vs. temperature for the past 350,000 years. Source: Holoceneclimate.com
CO2 vs. temperature for the past 10,000 years. Source: Holoceneclimate.com
The Younger Dryas was a cold snap 12,750-11,750 years ago. No correlation between CO2 and Greenland ice core temperatures. Source: P. Gosselin (NoTricksZone)
Temperature and solar activity decoupled around 1958. Source: Global Climate Change (NASA)
Florides and Christodoulides (February 2009) in their article "Global Warming and Carbon Dioxide Through Sciences" concluded the following [square brackets added for clarity and inclusiveness]:
"Earth is a dynamic planet with a continuous variation of its climate. The present study [by Florides and Christodoulides] has indicated that in their turn the atmosphere, the lithosphere and the biosphere of the Earth change constantly through complex mechanisms affecting the climate. Many of these changes are unpredictable, enormous and sometimes sudden. It is certain that such natural climate-changes—both cooling and warming—will occur again and again in the future. Studying the climate record indicates that the 20th[and 21st]-century changes fall well within frequently seen past natural variations."
"It is our view that, there is not yet sufficient let alone rigorous evidence that anthropogenic CO2-increase is indeed the main factor contributing towards the global warming of the 20th[and 21st]-century. This conclusion is supported by a mere study of the inconsistent related literature, reinforced by our analysis on the (probably more reliable and thus far overlooked) chemical CO2-records, essentially showing that one cannot be positive for a relationship between temperaturedifference and CO2-concentration. On the contrary the conclusions using the adiabatic [when net heat flow is zero] theory show that global warming due to atmospheric CO2-increase is impossible. Our study also points that even when the presence of CO2- concentration in the atmosphere was at levels much higher than today, the temperature still considerably fluctuated. Regardless of CO2's role on global warming, CO2 is a key factor for biological activity that has generally benefited because of the increase observed in the last century"
How Important Is CO2 To Life On Earth?
There are numerous articles written on the advantages of higher CO2 concentrations on plant life and the environment. Here are some benefits:
Increase in rate of photosynthesis encouages growth and produces more oxygen and carbohydrates.
Reduces the amount of water lost through stomatal transpiration making plants more water efficient. According to NASA, the increased soil moisture in the long term decreases forest fires and droughts worldwide.
Stimulates growth of beneficial bacteria both in soil and water.
Reduces soil erosion by increasing plant cover. As stated by NASA, up to 50% of Earth's greening is due to higher CO2 levels.
Increases crop yields and food quantity.
Helps plants generate natural repellants to fight insect pests.
Plants grow faster and are less stressed.
The CO2 threshold for plants is around 180 ppm and lower concentrations will result in poor or no plant growth worldwide. From commercial greenhouse data, the optimal CO2 concentrations for plant growth are around 1000-1200 ppm, and concentrations beyond 1650 ppm are considered toxic. The current decarbonization projects around the world are a concern and can hinder the greening of this planet and prevent needed increased crop production. It appears these projects are more politically motivated and based on fanaticism rather than true science and should be discontinued at once.
CO2 fertilization effect on global gross primary production (GPP). Source: Haverd, Smith et al
The current normal air CO2 concentration is 424 ppm. Source: Oklahoma Cooperative Extension Services Source: NOAA Climate.gov
Source: NOAA Climate.gov
Temperatures for the past 66 million years. Source: Salt Lake Community College
Summer temperature anomalies based on tree ring proxies for the past 7000 years. Source: Salt Lake Community College
Composition of Earth's Atmosphere. Note that CO2 is only 0.0407% of the earth's atmospheric composition. Source: Salt Lake Community College
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Deep
crevasse
on a
rigid
glacial surface.
Image: Simon Steinberger from Pixabay.com.
Frenchman
River Valley. A broad
deep glacial meltwater
channel occupied by the
'underfit' Frenchman River in
the
foreground.
The white band is the
Whitemud Formation (~67
Ma). Photo: Charles
Kuss |
A
post glacial feature formed in a proglacial outwash plain. A sand
dune in the Great Sand Hills, 18km east of Liebenthal, SK, east on
Twp 200. Photo: Charles Kuss
Glacial
features on a glacial claystone erratic, Hatton, SK cemetery, approx
9 km north of HWY 1 on gravel road 635. Notice the shallow
longitudinal striations (grooves and scratches) caused by debris
frozen in ice as it moved over the erratic. This claystone erratic
is not a Canadian Shield rock and may have originated from a nearby
regional subcrop. Photo: Charles Kuss
