405 kyr Jupiter-Venus driven Earth eccentricity cycle linked to paleoclimatic variation

Posted: July 10, 2019 by tallbloke in Astrophysics, Celestial Mechanics, climate, Cycles, Natural Variation, paleo

A recent review article on PNAS titled ‘Astronomical metronome of geological consequence’ by Linda Hinnov makes interesting reading for talkshoppers.

A Brief Retrospective
In geology, a reliable “metronome” in the geologic record with a sufficiently short repeat time would greatly enhance the resolving power of the geologic timescale. Astronomers recognized the potential importance of a dominant 405-ky cycle in Earth’s orbital eccentricity variation for supplying such a metronome (2, 3), leading geologists to turn to the stratigraphic record of astronomically forced paleoclimate change to search for this cycle. In fact, one of the first geological studies to describe 405-ky scale stratigraphic cycling was on the Triassic–Jurassic Newark Basin lacustrine strata (4, 5) recovered in the National Science Foundation-funded Newark Basin Coring Project, in which each of the prominent 60-m-thick McLaughlin cycles in the cored sequence was assigned a 412.885- ky periodicity based on a now-legacy analytical astronomical solution, BRE74/BER78 (6, 7). Since the 1990s, there have been dozens of reports for strong 405-ky scale cycles in stratigraphic sequences from around the world that appear to bear out this astronomical calculation (8).

Kent et al. (1) demonstrate that assigning a 405-ky periodicity to the McLaughlin cycles is verified by high-precision geochronology. Radioisotopic dates of 209.93 and 210.08 Ma in the Chinle Formation are precisely positioned within the Newark Basin by correlating the reverse polarity magnetozone (PF2r) in which the dates occur to the reverse polarity Chron E16r in the Newark Basin. E16r is dated as 209.95– 210.25 Ma by counting the 405-ky McLaughlin cycles from the chron boundaries to the zircon-dated 201.6-Ma Orange Mountain Basalt (OMB) in the upper part of the core series. Thus, PF2r and E16r have indistinguishable ages and affirm the long-suspected 405-ky periodicity of the McLaughlin cycles. Other radioisotope dates in the Chinle Formation at lower (older, 215 Ma) stratigraphic levels provide additional support. Kent et al. (1) also demonstrate that the McLaughlin cycles are phase-locked with the 405-ky orbital eccentricity cycle of the LA2004 astronomical solution for its nominal [+5, −15 My] integration (table 6 in ref. 3) projected back to 215 Ma.

Revisiting Solar System Chaos
Tuning with the 405-ky metronome should resolve other, higher order cycles related to the quasi–100-ky orbital eccentricity terms. Modulating quasi–100-ky scale cycles are pervasive and prominent in the Newark Basin (5), but they likely do not match any of the theoretical astronomical solutions. This is because the contributing quasi–100-ky terms are thought to be susceptible to disturbance by (unknown) chaotic behavior of the planetary orbits. Assuming that the Chinle dates approximate stratigraphic age, the results presented by Kent et al. disentangle multiple issues concerning Triassic chronostratigraphy, the geologic timescale, paleoclimate, evolution, and Solar System behavior, and open new lines of inquiry. However, chaotic behavior in Earth and Mars orbits predicted by LA2004 from 82 to 90 Ma has recently been observed in the quasi–100-ky and obliquity modulations (g4 −g3 and s4 −s3, respectively) of cyclic stratigraphy from the Western Interior Seaway, United States (25). In that study, all of the chaotic behavior of Earth and Mars occurred as modulation disturbances in quasi–100-ky terms related to g4 −g5, g4 −g2, g3 −g5, and g4 −g2 (table 6 of ref. 3), and detected as a g4 −g3 modulation rapidly transitioning from a 2,400-ky periodicity to a 1,200-ky periodicity, and back (while s4 −s3 maintained a 1,200-ky periodicity). This harkens to Olsen and Kent (26) who described a persistent 1,750-ky periodicity along the entire Newark Basin core sequence that was interpreted as evidence for a g4 −g3 term (i.e., 2,400 ky shortened to 1,750 ky) of the orbital eccentricity, and it is worth further probing Solar System dynamics to explain this behavior. The absence of an obliquity cycle in the Newark Basin strata (to measure s4 − s3) necessitates seeking another coeval astronomical record, with one excellent candidate section emerging in northwest China (27).

Confidence in Astrochronology
The independent confirmation of the 405-ky orbital eccentricity cycle in these ancient sedimentary deposits has been long-sought and will be enthusiastically welcomed by geologists. It represents an important “benchmark” in the rapidly expanding annals of cyclostratigraphy, the branch of stratigraphy dedicated to the study of astronomically forced climate change and the development of an astrochronology to support and refine the geologic timescale.

  1. Chaeremon says:

    Compare this high-precision geochronology effort, fully based on empirical data, against the phantoms which are “hunted” over at WUWT “New method may resolve difficulty in measuring universe’s expansion” where they impress each other as phantomic-gravitational waves ambulance chasers. That nothing of no substance bends nothing has been measured decades ago,

  2. tallbloke says:

    one of the really interesting sections for me is this:
    . In that study, all of the chaotic behavior of Earth
    and Mars occurred as modulation disturbances in quasi–100-ky
    terms related to g4 −g5, g4 −g2, g3 −g5, and g4 −g2 (table 6 of
    ref. 3), and detected as a g4 −g3 modulation rapidly transitioning
    from a 2,400-ky periodicity to a 1,200-ky periodicity, and back
    (while s4 −s3 maintained a 1,200-ky periodicity)

    The synodic conjunction precession cycles of Earth-Venus and Jupiter-Saturn are 1199 and 2403 years respectively. These are likely to be the cause of the “chaotic behavior of Earth and Mars ” at around the periodicity of the Earth eccentricity cycle.

  3. Paul Vaughan says:

    Primorial Eye Zing Sovereignty

    “At the time of the Spanish conquest the Maya had many books. […] The Spanish conquistadors and Catholic priests destroyed them whenever they found them. […] Only four of these codices exist today.”

    Juncker’s (phi^n)×talk wasn’t geographically Sirius enough to close the gap.

    1461 = 4 × 365.25 = 365.25 / (365.25 – 365)
    1460 = 20/5 × 365 = 365 / (365.25 – 365)

    Seidelmann Bot Mines Pay Sing a Raise of Slips

    146 = 2 × 73 = 4 × 36.5

    Seeds pack key messages tightly 4 rebirth after natural disaster.

    We do C nonlinear aliasing loops slipped right past what burned: 36.5, 73, 146 = (2/5)(365), 52, 104, 208 = (4/5)(260).

    Layers Deep Side El Mayan Dish….

    360 = 18 × 20

    ….Inspyring BRI10….

    A giant 360 around 1820:

    1 / 17.9708017526566 = -(3V+5E)/2-N
    1 / 18.0145390590911 = -3V+5E-2S
    1 / 20.0755942318385 = -(3V+5E)/2-U

    ….So VE Reigns

    harmonic of 146.000401793801 nearest 22.1392314983835 is 146.000401793801 / 7 = 20.8572002562573
    360.180290236598 = (22.1392314983835)*(20.8572002562573) / (22.1392314983835 – 20.8572002562573)

    20 amazing winter paintings from the little ice age tipped 146 / 4 for 5 seasons:

    20.0073915424486 = (44.2784629967671)*(36.5001004484502) / (44.2784629967671 + 36.5001004484502)
    207.777451493915 = (44.2784629967671)*(36.5001004484502) / (44.2784629967671 – 36.5001004484502)

    44.2784629967671 = (36.5001004484502)*(20.0073915424486) / (36.5001004484502 – 20.0073915424486)
    44.2784629967671 = (207.777451493915)*(36.5001004484502) / (207.777451493915 – 36.5001004484502)

    Schwabe slip threw de Vries JEVa line right past Seidelmann’s prime addiction:

    “In particular, on page 24 of the Dresden codex is written the so-called Long Round number noted or 1366560 days, a whole multiple of the Tzolk’in, the Haab’, the Tun, Venus and Mars synodic periods, the Calendar Round and the Xultun number X0: LR = 1366560 = 5256 × 260 = 3744 × 365 = 3796 × 360 = 2340 × 584 = 1752 × 780 = 72 × 18980 = 4 × 341640.”

    harmonic of 351.268846907657 nearest 44.2784629967671 is 351.268846907657 / 8 = 43.9086058634571
    5256.63940172076 = (44.2784629967671)*(43.9086058634571) / (44.2784629967671 – 43.9086058634571)

    903.809523809524 = (365)*(260) / (365 – 260)

    harmonic of 207.777451493904 nearest 11.0696157491918 is 207.777451493904 / 19 = 10.9356553417844
    903.65134700609 = (11.0696157491918)*(10.9356553417844) / (11.0696157491918 – 10.9356553417844)

    Retuning Eur. Favorite Orrery to EVaid Mayan Capture
    “Would U slip with a sci-cull? R’UN don’t walk away!” — AM

    Rare Earth Mines a Line of Mayan Minds
    Table I day-counts symbol eye zing VENUSJear-counts:

    Click to access 1312.1456.pdf

    Weaving Free of Hierarchical Horizons

    2:1 symbolic soundbite Hale O-wean day counts knot hellO’wellian year-counts 4 free ecological succession. History repeats wheel-reinvention 4 mess ageless lynx. C Charles, William, & Johnson R Q-wing psycle parameters, while Eur. reviewing 4 “52 year” prime-royal speech:


    Memory Burned into 1992‘s Calendar

    Rarely Earth’ Long ‘Round Mayan song sound ‘N’ SOL VE the “secular” free queen Cs 4 branches of R’stone’s age.

    Another colony of enslaved ants well-sorted by Mayan stone age morale:

    25685 = 1 / p
    45884 = 1 / g6
    49188 = 1 / s6
    68753 = 1 / s3
    72338 = 1 / g4
    72994 = 1 / s4
    74620 = 1 / g3
    173913 = 1 / g2
    183830 = 1 / s2
    231843 = 1 / g1
    231843 = 1 / s1
    304407 = 1 / g5
    419696 = 1 / g7
    433079 = 1 / s7
    1873547 = 1 / s8
    1925646 = 1 / g8
    3703069 = 1 / s9
    3703492 = 1 / g9

    The Deepest Mayan Minds the Mines of Giant Lines

    Mayan luminaries passed the ’92 sols test, botanically EVaiding slavery to giant soundbites.

    Queens of the Stone Age “Feel Good Hit of the Summer”

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