louderbackn.

/ˈlaʊdəbak/

Etymology: < the name of G. D. Louderback (1874–1957), American geologist.

Geology.

A cap of old lava on a tilted fault-block.

ΘΚΠ

the world > the earth > structure of the earth > structural features > rock formations > [noun] > dome or cap

cap rock1867

dome1900

louderback1930

the world > the earth > structure of the earth > structural features > volcanic formations > [noun] > lava formations > others

pahoehoe1825

malpais1844

spatter rampart1856

ring wall1858

aa1859

pedregal1881

pillow structure1897

pillow1899

pillow lava1903

block lava1914

ring dyke1915

louderback1930

1930 W. M. Davis in Bull. Geol. Soc. Amer. XLI. 299 It seems to me highly appropriate that the lava sheets, which were thus spread unconformably on the Powell surface of the worn-down King mountains, and which now cover the back slopes of the tilted Gilbert blocks, should be called Louderbacks, after their discoverer.

1965 W. D. Thornbury Regional Geomorphol. U.S. xxiv. 473/2 Some of the range have lava caps, called by Davis (1930) louderbacks.

1968 R. W. Fairbridge Encycl. Geomorphol. 679/1 Since the original [lava] flow would normally have filled a valley, the louderback is usually also a form of inverted topography.

This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018).

单词	louderback
释义	louderbackn. /ˈlaʊdəbak/ Etymology: < the name of G. D. Louderback (1874–1957), American geologist. Geology. A cap of old lava on a tilted fault-block. ΘΚΠ the world > the earth > structure of the earth > structural features > rock formations > [noun] > dome or cap cap rock1867 dome1900 louderback1930 the world > the earth > structure of the earth > structural features > volcanic formations > [noun] > lava formations > others pahoehoe1825 malpais1844 spatter rampart1856 ring wall1858 aa1859 pedregal1881 pillow structure1897 pillow1899 pillow lava1903 block lava1914 ring dyke1915 louderback1930 1930 W. M. Davis in Bull. Geol. Soc. Amer. XLI. 299 It seems to me highly appropriate that the lava sheets, which were thus spread unconformably on the Powell surface of the worn-down King mountains, and which now cover the back slopes of the tilted Gilbert blocks, should be called Louderbacks, after their discoverer. 1965 W. D. Thornbury Regional Geomorphol. U.S. xxiv. 473/2 Some of the range have lava caps, called by Davis (1930) louderbacks. 1968 R. W. Fairbridge Encycl. Geomorphol. 679/1 Since the original [lava] flow would normally have filled a valley, the louderback is usually also a form of inverted topography. This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018). < n.1930
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