Astronomy & Geology (superwave theory) continued
• In 1987, during the peristroika period, LaViolette spearheaded the first US-Soviet ice core exchange.  This resulted in closer ties between U.S. and Soviet ice core programs. LaViolette had wished to obtain ice samples from the new deep ice core that had been drilled at the Soviet base in Vostok, Antarctica.  Previously there was no way for U.S. researchers to receive samples from the Soviets due to the ongoing cold war.  After sending several letters to the Arctic and Antarctic Research Institute in Leningrad (St. Petersburgh), and one letter to the Soviet Embassy in Washington, LaViolette received a letter in May 1987 from the head of the Soviet polar program laboratory agreeing to provide LaViolette with samples and also suggesting that the U.S. and Soviet Union consider an exchange of polar scientists between their two Antarctic bases, Vostok and the Amundsen Scott Station.^[29]  The Division of Polar Programs at the National Science Foundation (NSF) had also received a copy of this letter, but the NSF division director had apparently not responded to the U.S.-Soviet exchange opportunity that was being offered to them, even after he had received a June 1st call from LaViolette.  The Division of Polar Programs did not realize that they had an important opportunity before them until after LaViolette had called up their office a second time in November of that year and pointed out to one of their personnel certain key passages in the Soviet's letter; see telecon transcript.^[30]  News of this exchange and of LaViolette's trip to pick up the Vostok ice samples was covered the following year in the science section of the Oregonian (June 9, 1988 issue).^[31]
• In 1984, LaViolette collaborated with a mass spectrometry group at Curtin University in Australia to examine the isotopic ratios of tin particles recovered from ice age polar ice.  This resulted in the first ever discovery of an isotopic anomaly in the element of tin and also demonstrated that the tin was of extraterrestrial origin.^[1]
• In 1983 and 1987, LaViolette predicted that interstellar dust has recently entered the solar system from the Galactic center direction.^{[1, 2]}  This prediction was later confirmed by the Ulysses spacecraft observations and New Zealand radar observations;^[32] see Superwave Prediction No. 5.
• In 1983, in this dissertation, he predicted that high levels of cosmic dust should be found in strata associated with the Pleistocene megafaunal extinction; see dissertation excerpt.  This prediction was later confirmed by the discovery of high levels of iridium and other ET indicators close to the Alleröd-Younger Dryas climatic boundary.^{[1, 33]}  This discovery was made by the "YDB Group" a scientific team led by Firestone et al.  Although, as LaViolette has shown, the supernova/comet impact theory that Firestone, et al. have advanced as an explanation for the deposition of this material is flawed; see "The cause of the megafaunal extinction: Supernova or Galactic core outburst."  In a recent paper, LaViolette argues that the evidence favors a cosmic dust source, rather than a comet-impact source.^{[ 34]}
• In 1983, in this dissertation^[1] and in later publications,^{[2, 35]}  LaViolette proposed that geomagnetic field reversals and excursions can occur rapidly as a result of the impact of a supersize solar coronal mass ejections; see Superwave Prediction No. 10, also see dissertation excerpt.  This was later confirmed by the discovery of the Steens Mountain field reversal recorded in an ancient lava flow while it was in the process of cooling.^{[1, 36]}  In 1995, two French geophysicists, P. Ultre-Guerard and J. Achache, published a paper in Earth and Planetary Science Letters suggesting LaViolette's solar-geomagnetic field mechanism as an explanation of the Steens Mountain reversal.
• LaViolette is also the first to propose that supersize solar proton events were a contributing cause to the Pleistocene mass extinction as well as to other past extinction events.^{[1, 34]}
• In 1983, LaViolette originated the continental glacier wave theory, the idea that an ice dam failure on the surface of a continental ice sheet could produce a wave that would grow to enormous size by sequentially discharging ponds of water perched on the ice sheet's surface.^{[1, 3]}  This not only provides a reasonable scientific explanation for the extensive flood deposits dating from the end of the ice age, but also presents a credible explanation for the sudden freezing of the arctic mammals.  It also can account for Heinrich layers later found to be present in ocean sediments.
• In 1983, LaViolette presented evidence showing that the warming at the end of the last ice age occurred simultaneously in both hemispheres indicating that a global warming had taken place.^{[1-3, 37]}  Subsequently published data has continued to confirm this hypothesis; see Superwave Prediction No. 8.
• In 2005, LaViolette presented evidence indicating that recurrent variations in polar ice acidity in 15,800 year old ice have a period equal to the solar cycle period, and suggesting that high concentrations of cosmic dust had entered the solar system at that time.^[38]