Whidbey Island, WA DOUBLE BLUFF is a PROTRUSION into Puget Sound, exhibiting a POLYGONAL SET of LINEARS, of at least 8 sides, wit AGE of 125,000 years or more:

DOUBLE BLUFF, WHIDBEY ISLAND, WA is shown below to illustrate the method of CALCULATING ROTATIONAL MOVEMENTS and TIME INTERVALS for EARTH TIDAL movements. The ERRORS DEPEND UPON CAREFUL DELINEATION and MEASUREMENT, as well as PROPER SELECTION of CRUSTAL QUADRANTS- which determine 10.24, 20.48, up to 30.72 mm/year TIDAL MOVEMENT RATES (and some that may exhibit magnitudes between the extremes):

How to CHECK CALCULATIONS for ARCS and TIME INTERVALS (= ARC distance x 360/arc angle/pi {= circular DIAMETER}/tidal movement rate):

Below is an example of INTERPRETION of GOOGLE EARTH DATA (for DOUBLE BLUFF near Freeland, WA), where the appropriate divisor (10.24, 20.48, or 30.72) is uncertain; the correct one can be found by TRIAL and ERROR. First, guess at the QUADRANT, determined by a glance at the corner of the island or block of CRUST- where the arc to be used is located near the intersection of 2 quadrants (E at 10.24, or SW at 30.72mm.yr?). Then, LOCATE the FULCRUM for the radius of the arc (the center of the circle subtended by the arc). When there are 2 arcs to be used, there will be 2 FULCRUMS; this allows the distance between the two to be measured with the Google distance tool. This distance divided by the TIME INTERVAL associated with the 2 arcs, allows a calculation of TIDAL MOVEMENT RATE: separation/time interval= TIDAL RATE. When this rate is unreasonable (140 mm/yr., for this case), then either the measurement or the calculated time interval is inaccurate. This case proved that the 10.24 tidal rate should have been used. Once confidence is obtained, other useful information can be found in the vicinity. I have improved, by TRIAL AND ERROR, the tidal rates- as shown in the following diagram (notice that the eastern hemisphere has been subdivided into six 30 degree arcs, so that you can use the sine 30d = 1/2 relation in your head). This was found to be generally true from cases such as the Gulf of Mexico:

(notice that there are 3 separate ARCS on the EAST CONTINENTAL SLOPE, in this 40-64 m.y. development. This has been found to be duplicated in volcanoes, SINKHOLES, and other "ROUND" features:

Resurgent DOMES are formed later, but they are subject to the same GRAVITATIONAL LATERAL INFLUENCE- such as Wizard Island;

 CONCLUSIONS:
1.There is a LIDAR DIVIDER, which shows that DB exists due to COMPRESSIONAL UPLIFT, EXTRA COMPACTION, and interference between gravitational movements;

2.There is gradual change across the SW to SE border, such that the last TIDAL RATE is 14.5mm/yr.- about half way between 10.24 and 20.48mm/yr. (see ABOVE DIAGRAM as to how this RATE may be solved for a continuously-changing SINE FUNCTION) and,

3.The DB area has been active since the 2 m.y. AGE (ELTANIN EVENT), showing that the ICE AGE influenced the movements during that TIME INTERVAL. DB is a feature which exhibits quarter million year silts and peats (NON-GLACIAL), and these can be examined in the cliffs. Further, the tidal terrace should exhibit PRE-STONE as old as 2 m.y. Other interesting features include: soil liquefaction (compressional squeezing), peat fragments transported from older interstades (intervals between glaciations), and arcuate curvilinears in the tidal zone.

YOU MAY WANT TO KEEP THE FOLLOWING QUESTIONS IN MIND, AS YOU READ this BLOG:
1. WHY DO THE ADJACENT LANDMASSES TO THE WEST AND SOUTH INDICATE DIFFERENT RULES FOR TIDAL MOVEMENTS, AS SHOWN BY CONVEX DIRECTIONS (NORTH FOR AUSTRALIA AND EASTWARD SHIFTS FOR ASIA)?
2. SINCE THE AUSTRALIA CONTINENT AND ASSOCIATED TONGA TRENCH, SOUTH PACIFIC VOLCANIC ZONE, AND THE FRAGMENTED ISLANDS INDICATE FASTER MOVEMENTS, THOUGH BEING UNDER THE INFLUENCE OF THE OLDER DYNAMICS (256 M.Y. EVENT), WHY ARE THEY AT VARIANCE WITH our HEMISPHERE?
3. IS THE PACIFIC BASIN BECOMING SMALLER, WITH THE VARIOUS CONVEX INDICATIONS? AND,
4.DOES THE MANTLE OR CORE OF THE EARTH HAVE ANY INFLUENCE ON WHAT IS SHOWN AT THE SURFACE of the EARTH (AS IS DRAMATICALLY PURSUED BY THOSE DERIVING AN INCOME FROM THIS TYPE OF RESEARCH)?

UNDERSTANDING EARTH TIDES is made simple, by watching the ATMOSPHERIC TIDAL changes on BROAD SCALE Weather MAPS- such as published by NASA daily (they follow SIMILAR RULES):

www.ghcc.msfc.nasa.gov/GOES/goeseastfull.html

This is shown BARE, so that you can make your own APPRAISALS:

Other workers have measured the MOVEMENT DIRECTION of the EARTH'S CRUST (shown by vectors), and we should keep this GENERALIZED VERSION in mind as we solve the PARTICULARS. This global view does NOT ACCOUNT for local REVERSALS, or changes within a SMALL BLOCK of CRUST:

An UP-DATED VERSION FOLLOWS:

 Although this OBLIQUE VIEW appears to be continuously-varying along an ARCUATE PATH, it is not- but consists of a set of LINEARS ANGLING AWAY from each other at MEASUREABLE ANGLES, in degrees of the COMPASS 360 DEGREE SPAN. These can be measured as close as 1/10th of a degree on the GOOGLE MEASUREMENT SCALE:

This view still appears ROUNDED, but if you hike the 1 mile trek, you see that it is more ANGULAR:

It has experienced CONSIDERABLE LIQUIFACTION and COMPRESSION-SQUEEZING, and recent activity confirms that it MOVES SW faster than EROSION can offset the shove. It PROTRUDES into the Puget sound, and advances to the southwest at nearly 1/3rd inch yearly.

The EQUATION (360-X)/X= INTEGER cannot be solved for I= 0, and the solutions for commonly-encountered POLYGONS are as follows:

I= 1, X= 180 degrees is a reference, since this relates to a REVERSAL;

I= 2, X= 120 degrees- portraying a 3-SIDED POLYGON (see Great Slave Lake below);

I= 3, X= 90 degrees, or the ORTHOGONAL FRACTURES perpendicular to bedding planes;

I= 4, X= 72 degrees- which is 10 times the 7.2 latitude TRANSFORM SPACING along the CA coastline;

!= 5, X= 60 degrees- yielding a HEXAGON, such as exists on OUTCROP SLOPES;

I= 6 does NOT YIELD even degrees of the COMPASS ROSE or of rotation;

I= 7, X= 45 degrees, yielding an OCTAGON. This should occur ATOP MESAS, see Checkerboard, Zion NP:

I= 8, X= 40 degrees, portrays a PENTAGON- which occurs on a slope ABOVE a 4-sided vertical OUTCROP;

I= 9, X= 36 degrees- 1/10^th of a circle; this is so close to 40 degrees, that it may be difficult to ascertain;

I= 10 does not yield an even number of degrees slant;

I= 11, X= 30 degrees, a 12-sided POLYGON- a DODECAGON (rare in usage, but common in CRATERS);

I= 12, 13 have NO SOUTIONS!

I= 14, X= 24 degrees CANNOT be distinguished from 25 degrees, unless I improve MEASURING ABILITY.

I= 17, X= 20 degrees, and this 1/18^th of a circle is NOT COMMON!

!= 19, X= 18 degrees- 1/20^th of a circle, and difficult to distinguish from X=15 degrees, for I irregular;

I= 23, X= 15 degrees- 1/24^th of a circle, and the MOST COMMON, to be used as the MAIN REFERENCE, and, I= 35, X= 10 degrees is near the LIMIT of usage with GOOGLE EARTH.