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Dear all To oppose the innovation or new ideology is the common psychology. Albeit it makes its way with time. See the etymology of the word "pretty" had taken its start with negative sense of meaning. But today we all know the meaning of pretty with positive sense of meaning. I think we should encourage him and suggest to solve his problem he has. Today things have become integrated e.g. the terms (1) "Anatomy" is a pure biological term is also being used in geology and (2) "Architecture" an engineering term has also made its place in structural geology. Cheers ijaz ------------------------------------------------ IJAZ AHMAD Geologist Gilgit-Baltistan Directorate Division of Environmental and Engineering Geology Geological Survey of Pakistan Islamabad-44000 PAKISTAN ------------------------------------------------- ________________________________________ From: Tectonics & structural geology discussion list <[log in to unmask]> on behalf of Mark Brandon <[log in to unmask]> Sent: Thursday, January 21, 2016 8:19 PM To: [log in to unmask] Subject: Re: Terms for an originally plane surface transected by cross-cutting faults I agree that there is little use introducing new terms. That said, it is quite common for scientific fields to invent their own terms, when other fields have already have a working set of terms. As an example, consider our terms, trend and plunge, as used for the orientation of a linear feature. Mathematics uses azimuth and polar angles. Astronomy uses azimuth and attitude. Studies of the Earth's magnetic field use declination and inclination for the local field direction. Recently, seismologists have invented their own terminology, azimuth and tilt, to describe the orientation of axial symmetry in the mantle for studies as measured by seismic anisotropy. Also consider that there are multiple geometric definitions for planes in geology, such as strike and dip, and the downdip direction, and the pole (normal) to the plane. In mathematics, one would use the gradient, as defined in vector calculus. I know that there is some work to adapt to new terms and units (e.g. miles to kilometers, kB to MPa), but there is a benefit in iterating toward using commonly used generic terms, in that it makes the field more assessable to students and other scientists. Best, Mark Brandon > On Jan 20, 2016, at 6:38 PM, Yoshinobu, Aaron <[log in to unmask]> wrote: > > "although the peneplain [or, insert your favorite planar surface here] may have had an initial dip of x degrees, it currently dips y degrees". > > But, I do like the sound of fractiplat and platoclasm. ;-) > > A > > Aaron Yoshinobu > Professor > Department of Geosciences > Texas Tech University > Lubbock, TX 79410 > U.S.A. > > Fax: 806-742-0100 > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.depts.ttu.edu_gesc_Faculty-2DStaff_Yoshinobu-2Dindex.php&d=AwIFAg&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=mCU0_0FDG50eHt8ypdCjDJmlIrw8iPZF_l1Mc_qFhz8&m=yODDm78-pvswyJhZbVzC76OMF9hmcQUpViNJZnz_73c&s=m8Zc20U1ZBg_S3kD9dMjLGZ5SlaCupKn6COTQOAbjRI&e= > > ________________________________________ > From: Tectonics & structural geology discussion list [[log in to unmask]] on behalf of Malcolm McClure [[log in to unmask]] > Sent: Wednesday, January 20, 2016 4:00 PM > To: [log in to unmask] > Subject: Terms for an originally plane surface transected by cross-cutting faults > > I would appreciate advice on choosing generic terms to help describe an originally plane surface that is transected by a cross-cutting network of normal and reverse faults. The original two-dimensional surface could be a widespread bedding plane, also a peneplain that is significantly disrupted within a definite area. > > One term is needed to refer to the dip of individual fault blocks but dip is hardly appropriate when applied to the eroded surface of a peneplain. Perhaps incline could be used. > > A second term is required to refer to the individual fault blocks. I considered fractiplat from Gk. broken plane, which seems better than a platoclasm, from Gk. plane broken, although the latter could possibly serve as a collective term for the disrupted area. > > I do have an application in mind for these precise neologisms. Any comments or suggestions would be warmly welcome. > > Malcolm.