The Gulf has gradually expanded with time, mainly since the KT (Cretaceous-Tertiary boundary) event, and it has been dominated by the LUNAR-SOLAR ANALEMMA development. It is an excellent example for the determination of EARTH TIDAL RATES, and it exhibits not only the analemma shape, but also ellipses which either surround the oldest analemma or are contained within it (as younger features). Since most of STRUCTURAL GEOLOGY results from these movements, this is valuable for measurement of rates, rotational shearing, uplift-sinking rates and magnitudes, and catastrophic events such as earthquakes, geothermal expressions (hot springs, seeps, vulcanism, and solubility changes of chemicals- producing slickensides), faulting, and EXTRUSIONS-INTRUSIONS.
Since I lived within 50 km of Trinity Bay for 30 years, I annually harvested “BLACK MALLARDS” and snow geese in the TIDAL MARSHES of the bay. “Blue Northers” and other bizarre tidal occurrences were witnessed in these backwaters.
The shape of the bay and the ARCUATE SHORELINES relate that a measurement of the TIME INTERVAL DEVELOPMENT for TRINITY BAY can be calculated from the TRIGONOMETRIC SINE WAVE EQUATIONS, that I have previously discovered. Trinity Bay has developed, starting about 4 m.y. ago, and it has expanded both east and westward since then. The calculated eastward rate of the oldest movement is 10.79 mm/yr, which is within 5.4% of the SOLAR TIDAL RATE of 10.24 mm/year. Note that this is reverse to the normal LUNAR TIDAL DIRECTION to the west, and this indicates that the EXTENSIONAL TIME, during the ICE AGE, is reverse to what is expected. The ice age occurred during a period when the earth was further from the sun than normal (THE SUN WAS LESS DOMINANT)- probably due to an ASTEROIDAL GRAVITATIONAL EVENT, initiated at 2-4 m.y. AGE. Trinity bay says the reverse- that the sun’s tidal rate was indicated, when the gravitational system produced the LUNAR EXTENSION. Remember that the Full Moon pulls the earth away from the sun (LUNAR EXTENSION in earth's CRUST, indicated in Trinity Bay), while the New Moon combines with the sun to shorten the distance from earth to the sun to create compression on earth and a shorter day.
The LINEAR DIVIDER (WASATCH LINE) in Trinity Bay exhibits the N-S line where LUNAR WEST TIDES separate from the SOLAR EAST TIDES; this is the west extent of the TRANSITION ZONE, with the east extent shown as a BLUE LINE. The RATIO of distances along the RED LINE to the SE shore of Trinity Bay separated by the blue line is 1.6- which is the usual ratio of diameters of AXIAL/PRECESSIONAL MILANKOVITCH CYCLES (40/25). The Axial cycle lies west of the blue line, and the Precessional cycle lies east of the blue line. Altogether, the result is to PRODUCE EXTENSION (BASIN DEVELOPMENT) and an environment with low pressure gradients which draw oil, and not high pressure gas. Bays, basins, and grabens are produced by crustal EXTENSION, and NOT BY COMPRESSION. Conversely, high pressure gradients are produced by compression, as the crust is forced to the SE by GRAVITATIONAL MOVEMENT toward the center of the Gulf of Mexico. This case represents one where there are two influences- deep and shallow- and where the deep COMPRESSION DOMINATES the eastward tidal rates and direction. THIS CASE INDICATES HIGH PRESSURE GEOPRESSURE, Gp, which is caused by the SLIDE of HIGHLY PRESSURED ISOLATED SHALE BLOCKS toward the GULF CENTER. This zone is normally at least 3000 meters depth, so that we have a clue as to the influence of the SOLAR GRAVITATIONAL ZONE DEPTH. Deeper than 7000 meters. the zone may be hotter than normal- greater than 1.3 degrees F/100ft- but at normal pressure (.465 psi/ft x depth).