May day at the mall in Washington, D.C.

General note: Title and date provided by Bettye Lane.

Kate Millett at Gay and Lesbian Civil Rights March

General note: Title and date provided by Bettye Lane.

Golda Meir Poster at NOW Conference

General note: Title and date provided by Bettye Lane.

Viveca Lindfors at NOW conference

General note: Title and date provided by Bettye Lane.

Non-sexist toy display at NOW Conference

General note: Title and date provided by Bettye Lane.

Wilma Scott Heide at press conference at NOW conference in Washington, D.C.

General note: Title and date provided by Bettye Lane.

Susan B. Anthony poster at NOW conference in Washington, D.C.

General note: Title and date provided by Bettye Lane.

Union women at RFK Stadium in Washington, D.C.

General note: Title and date provided by Bettye Lane.

ERA rally, Washington, D.C.

General note: Title and date provided by Bettye Lane.

Sarah Weddington, Presidential liason to women's groups

General note: Title and date provided by Bettye Lane.

ERA demonstration Washington, D.C.

Inscription: ERA rally Washington, D.C. Jul 9 1978

The Pico de Navas slump (Burgos, Spain): a large rocky landslide caused by underlying clayey sand fluidification

The Pico de Navas landslide was a large-magnitude rotational movement, affecting 50x106m3 of hard to soft rocks. The objectives of this study were: (1) to characterize the landslide in terms of geology, geomorphological features and geotechnical parameters; and (2) to obtain an adequate geomechanical model to comprehensively explain its rupture, considering topographic, hydro-geological and geomechanical conditions. The rupture surface crossed, from top to bottom: (a) more than 200 m of limestone and clay units of the Upper Cretaceous, affected by faults; and (b) the Albian unit of Utrillas facies composed of silty sand with clay (Kaolinite) of the Lower Cretaceous. This sand played an important role in the basal failure of the slide due to the influence of fine particles (silt and clay), which comprised on average more than 70% of the sand, and the high content presence of kaolinite (>40%) in some beds. Its geotechnical parameters are: unit weight (δ) = 19-23 KN/m3; friction angle (φ) = 13º-38º and cohesion (c) = 10-48 KN/m2. Its microstructure consists of accumulations of kaolinite crystals stuck to terrigenous grains, making clayey peds. We hypothesize that the presence of these aggregates was the internal cause of fluidification of this layer once wet. Besides the faulted structure of the massif, other conditioning factors of the movement were: the large load of the upper limestone layers; high water table levels; high water pore pressure; and the loss of strength due to wet conditions. The 3D simulation of the stability conditions concurs with our hypothesis. The landslide occurred in the Recent or Middle Holocene, certainly before at least 500 BC and possibly during a wet climate period. Today, it appears to be inactive. This study helps to understand the frequent slope instabilities all along the Iberian Range when facies Utrillas is present.

Put-in-Bay Commercial District

Titled "Along the Pike, Put-in-Bay, O." this postcard features Delaware Avenue, the main commercial district of Put-in-Bay. The Hunker House was known by several names during its existence. Here it is the Hotel Delschlacer. In its final days of 1971, it was the Crescent Hotel.

El Señorío de Chillón. De Bernardo de Cabrera a Sancho de Alburquerque

El presente artículo se refiere a la evolución que experimentó la villa de Chillón en los decenios centrales del siglo XIV. Chillón, perteneciente al término de Córdoba, fue señorío de relevantes personajes de la época. Entre 1344 y 1350, perteneció a Bernardo de Cabrera, privado de Pedro IV de Aragón. Posteriormente, pasó a poder de Juan Alfonso de Alburquerque, que desempeñó la misma función en la Corte del rey Pedro de Castilla. Reintegrada posteriormente a la jurisdicción de Córdoba, fue entregada por Enrique II a su hermano don Sancho, que no logró vencer la oposición de la ciudad y no llegó realmente a posesionarse de la villa, la cual terminó por vender a Diego Fernández de Córdoba, alguacil mayor de Córdoba, en 1370.